diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorCategoryBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorCategoryBlock.php
index 6535814d9c9..8b3c616c5e4 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorCategoryBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorCategoryBlock.php
@@ -33,7 +33,7 @@ class AggregatorCategoryBlock implements DerivativeInterface {
     $result = db_query('SELECT cid, title FROM {aggregator_category} ORDER BY title WHERE cid = :cid', array(':cid' => $derivative_id))->fetchObject();
     $this->derivatives[$derivative_id] = $base_plugin_definition;
     $this->derivatives[$derivative_id]['delta'] = $result->cid;
-    $this->derivatives[$derivative_id]['subject'] = t('@title category latest items', array('@title' => $result->title));
+    $this->derivatives[$derivative_id]['admin_label'] = t('@title category latest items', array('@title' => $result->title));
     return $this->derivatives[$derivative_id];
   }
 
@@ -46,7 +46,7 @@ class AggregatorCategoryBlock implements DerivativeInterface {
     foreach ($result as $category) {
       $this->derivatives[$category->cid] = $base_plugin_definition;
       $this->derivatives[$category->cid]['delta'] = $category->cid;
-      $this->derivatives[$category->cid]['subject'] = t('@title category latest items', array('@title' => $category->title));
+      $this->derivatives[$category->cid]['admin_label'] = t('@title category latest items', array('@title' => $category->title));
     }
     return $this->derivatives;
   }
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorFeedBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorFeedBlock.php
index 88da3861270..663bf5fce87 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorFeedBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Derivative/AggregatorFeedBlock.php
@@ -33,7 +33,7 @@ class AggregatorFeedBlock implements DerivativeInterface {
     $result = db_query('SELECT fid, title, block FROM {aggregator_feed} WHERE block <> 0 AND fid = :fid', array(':fid' => $derivative_id))->fetchObject();
     $this->derivatives[$derivative_id] = $base_plugin_definition;
     $this->derivatives[$derivative_id]['delta'] = $result->fid;
-    $this->derivatives[$derivative_id]['subject'] = t('@title feed latest items', array('@title' => $result->title));
+    $this->derivatives[$derivative_id]['admin_label'] = t('@title feed latest items', array('@title' => $result->title));
     return $this->derivatives[$derivative_id];
   }
 
@@ -46,7 +46,7 @@ class AggregatorFeedBlock implements DerivativeInterface {
     foreach ($result as $feed) {
       $this->derivatives[$feed->fid] = $base_plugin_definition;
       $this->derivatives[$feed->fid]['delta'] = $feed->fid;
-      $this->derivatives[$feed->fid]['subject'] = t('@title feed latest items', array('@title' => $feed->title));
+      $this->derivatives[$feed->fid]['admin_label'] = t('@title feed latest items', array('@title' => $feed->title));
     }
     return $this->derivatives;
   }
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorCategoryBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorCategoryBlock.php
index 2f172161b8b..dde835de22c 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorCategoryBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorCategoryBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "aggregator_category_block",
- *   subject = @Translation("Aggregator category"),
+ *   admin_label = @Translation("Aggregator category"),
  *   module = "aggregator",
  *   derivative = "Drupal\aggregator\Plugin\Derivative\AggregatorCategoryBlock"
  * )
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorFeedBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorFeedBlock.php
index e5d125d4850..f9aa6c49b36 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorFeedBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/block/block/AggregatorFeedBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "aggregator_feed_block",
- *   subject = @Translation("Aggregator feed"),
+ *   admin_label = @Translation("Aggregator feed"),
  *   module = "aggregator",
  *   derivative = "Drupal\aggregator\Plugin\Derivative\AggregatorFeedBlock"
  * )
diff --git a/core/modules/block/block.admin.inc b/core/modules/block/block.admin.inc
index eab2d8d0b96..18b9c767880 100644
--- a/core/modules/block/block.admin.inc
+++ b/core/modules/block/block.admin.inc
@@ -77,7 +77,7 @@ function block_admin_edit(Block $entity) {
     $theme_title = t('!theme (administration theme)', array('!theme' => $theme_title));
   }
 
-  // Get the block subject for the page title.
+  // Get the block label for the page title.
   drupal_set_title(t("Configure %label block in %theme", array('%label' => $entity->label(), '%theme' => $theme_title)), PASS_THROUGH);
 
   return entity_get_form($entity);
diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 97ad2d25ed0..18b9d270519 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -477,7 +477,7 @@ function block_load($entity_id) {
 }
 
 /**
- * Builds the content and subject for a block.
+ * Builds the content and label for a block.
  *
  * For cacheable blocks, this is called during #pre_render.
  *
diff --git a/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/Derivative/CustomBlock.php b/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/Derivative/CustomBlock.php
index a94fbe356fd..592f150cfb4 100644
--- a/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/Derivative/CustomBlock.php
+++ b/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/Derivative/CustomBlock.php
@@ -46,7 +46,7 @@ class CustomBlock implements DerivativeInterface {
       $this->derivatives[$custom_block->uuid->value]['settings'] = array(
         'info' => $custom_block->info->value,
       ) + $base_plugin_definition['settings'];
-      $this->derivatives[$custom_block->uuid->value]['subject'] = $custom_block->info->value;
+      $this->derivatives[$custom_block->uuid->value]['admin_label'] = $custom_block->info->value;
     }
     return $this->derivatives;
   }
diff --git a/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/block/block/CustomBlockBlock.php b/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/block/block/CustomBlockBlock.php
index ce89a588ec4..e7e88f61db9 100644
--- a/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/block/block/CustomBlockBlock.php
+++ b/core/modules/block/custom_block/lib/Drupal/custom_block/Plugin/block/block/CustomBlockBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *  id = "custom_block",
- *  subject = @Translation("Custom Block"),
+ *  admin_label = @Translation("Custom block"),
  *  module = "custom_block",
  *  derivative = "Drupal\custom_block\Plugin\Derivative\CustomBlock",
  *  settings = {
diff --git a/core/modules/block/lib/Drupal/block/BlockBase.php b/core/modules/block/lib/Drupal/block/BlockBase.php
index 9e5bf6c21e4..9c90a5a4adb 100644
--- a/core/modules/block/lib/Drupal/block/BlockBase.php
+++ b/core/modules/block/lib/Drupal/block/BlockBase.php
@@ -70,10 +70,9 @@ abstract class BlockBase extends PluginBase implements BlockInterface {
       // default settings for the block plugin.
       $this->configuration = $this->settings();
 
-      // @todo This loads the default subject. Is this the right place to do so?
       $definition = $this->getDefinition();
-      if (isset($definition['subject'])) {
-        $this->configuration += array('subject' => $definition['subject']);
+      if (isset($definition['admin_label'])) {
+        $this->configuration += array('admin_label' => $definition['admin_label']);
       }
     }
     // Ensure that the default cache mode is set.
@@ -238,7 +237,7 @@ abstract class BlockBase extends PluginBase implements BlockInterface {
       '#type' => 'textfield',
       '#title' => t('Title'),
       '#maxlength' => 255,
-      '#default_value' => !$entity->isNew() ? $entity->label() : $definition['subject'],
+      '#default_value' => !$entity->isNew() ? $entity->label() : $definition['admin_label'],
     );
     $form['machine_name'] = array(
       '#type' => 'machine_name',
diff --git a/core/modules/block/lib/Drupal/block/BlockListController.php b/core/modules/block/lib/Drupal/block/BlockListController.php
index e8f035c182c..4b424dd039e 100644
--- a/core/modules/block/lib/Drupal/block/BlockListController.php
+++ b/core/modules/block/lib/Drupal/block/BlockListController.php
@@ -138,7 +138,7 @@ class BlockListController extends ConfigEntityListController implements FormInte
     foreach ($entities as $entity_id => $entity) {
       $info = $entity->getPlugin()->getDefinition();
       $form['blocks'][$entity_id]['info'] = array(
-        '#markup' => check_plain($info['subject']),
+        '#markup' => check_plain($info['admin_label']),
       );
       $form['blocks'][$entity_id]['theme'] = array(
         '#type' => 'hidden',
@@ -149,14 +149,14 @@ class BlockListController extends ConfigEntityListController implements FormInte
         '#default_value' => $entity->get('weight'),
         '#delta' => $weight_delta,
         '#title_display' => 'invisible',
-        '#title' => t('Weight for @block block', array('@block' => $info['subject'])),
+        '#title' => t('Weight for @block block', array('@block' => $info['admin_label'])),
       );
       $form['blocks'][$entity_id]['region'] = array(
         '#type' => 'select',
         '#default_value' => $entity->get('region') != BLOCK_REGION_NONE ? $entity->get('region') : NULL,
         '#empty_value' => BLOCK_REGION_NONE,
         '#title_display' => 'invisible',
-        '#title' => t('Region for @block block', array('@block' => $info['subject'])),
+        '#title' => t('Region for @block block', array('@block' => $info['admin_label'])),
         '#options' => $this->regions,
       );
       $links['configure'] = array(
diff --git a/core/modules/block/lib/Drupal/block/BlockRenderController.php b/core/modules/block/lib/Drupal/block/BlockRenderController.php
index e7053106585..e1c560e3755 100644
--- a/core/modules/block/lib/Drupal/block/BlockRenderController.php
+++ b/core/modules/block/lib/Drupal/block/BlockRenderController.php
@@ -53,7 +53,7 @@ class BlockRenderController implements EntityRenderControllerInterface {
         'id' => $entity->get('plugin'),
         'region' => $entity->get('region'),
         'module' => $entity->get('module'),
-        'subject' => check_plain($entity->label()),
+        'label' => check_plain($entity->label()),
       ),
     );
   }
diff --git a/core/modules/block/lib/Drupal/block/Plugin/system/plugin_ui/BlockPluginUI.php b/core/modules/block/lib/Drupal/block/Plugin/system/plugin_ui/BlockPluginUI.php
index 5beb4826814..722588d218a 100644
--- a/core/modules/block/lib/Drupal/block/Plugin/system/plugin_ui/BlockPluginUI.php
+++ b/core/modules/block/lib/Drupal/block/Plugin/system/plugin_ui/BlockPluginUI.php
@@ -31,7 +31,7 @@ use Drupal\Core\Annotation\Translation;
  *   task_suffix = "library",
  *   task_title = @Translation("Library"),
  *   title = @Translation("Add block"),
- *   title_attribute = "subject",
+ *   title_attribute = "admin_label",
  *   type = MENU_LOCAL_ACTION
  * )
  */
@@ -144,7 +144,7 @@ class BlockPluginUI extends PluginUIBase {
     $plugin_definition = $this->getDefinition();
     list($plugin, $theme) = explode(':', $this->getPluginId());
     $row = array();
-    $row[] = check_plain($display_plugin_definition['subject']);
+    $row[] = check_plain($display_plugin_definition['admin_label']);
     $row[] = array('data' => array(
       '#type' => 'operations',
       '#links' => array(
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockStorageUnitTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockStorageUnitTest.php
index d0c833ae5ff..d98f245984c 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockStorageUnitTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockStorageUnitTest.php
@@ -101,7 +101,7 @@ class BlockStorageUnitTest extends DrupalUnitTestBase {
       'plugin' => 'test_html_id',
       'settings' => array(
         'cache' => '1',
-        'subject' => t('Test block html id'),
+        'admin_label' => t('Test block html id'),
       ),
     );
     $this->assertIdentical($actual_properties, $expected_properties, 'The block properties are exported correctly.');
diff --git a/core/modules/block/templates/block.tpl.php b/core/modules/block/templates/block.tpl.php
index 8c421319acc..16ced6027d8 100644
--- a/core/modules/block/templates/block.tpl.php
+++ b/core/modules/block/templates/block.tpl.php
@@ -5,7 +5,7 @@
  * Default theme implementation to display a block.
  *
  * Available variables:
- * - $block->subject: Block title.
+ * - $block->label: Block title.
  * - $content: Block content.
  * - $block->module: Module that generated the block.
  * - $block->delta: An ID for the block, unique within each module.
@@ -48,8 +48,8 @@
 <?php endif; ?>
 
   <?php print render($title_prefix); ?>
-<?php if ($block->subject): ?>
-  <h2<?php print $title_attributes; ?>><?php print $block->subject ?></h2>
+<?php if ($block->label): ?>
+  <h2<?php print $title_attributes; ?>><?php print $block->label; ?></h2>
 <?php endif;?>
   <?php print render($title_suffix); ?>
 
diff --git a/core/modules/block/tests/config/block.block.stark.test_block.yml b/core/modules/block/tests/config/block.block.stark.test_block.yml
index 7428765d19d..59ba7b4c0ea 100644
--- a/core/modules/block/tests/config/block.block.stark.test_block.yml
+++ b/core/modules/block/tests/config/block.block.stark.test_block.yml
@@ -8,4 +8,4 @@ visibility: {  }
 plugin: test_html_id
 settings:
   cache: '1'
-  subject: 'Test block html id'
+  admin_label: 'Test block html id'
diff --git a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestCacheBlock.php b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestCacheBlock.php
index 6665e0d4bf5..f357762f617 100644
--- a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestCacheBlock.php
+++ b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestCacheBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "test_cache",
- *   subject = @Translation("Test block caching"),
+ *   admin_label = @Translation("Test block caching"),
  *   module = "block_test"
  * )
  */
diff --git a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestHtmlIdBlock.php b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestHtmlIdBlock.php
index 53e9598c457..d86f63bae09 100644
--- a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestHtmlIdBlock.php
+++ b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestHtmlIdBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "test_html_id",
- *   subject = @Translation("Test block html id"),
+ *   admin_label = @Translation("Test block html id"),
  *   module = "block_test"
  * )
  */
diff --git a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestXSSTitleBlock.php b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestXSSTitleBlock.php
index 485c716957b..0144c7bc803 100644
--- a/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestXSSTitleBlock.php
+++ b/core/modules/block/tests/lib/Drupal/block_test/Plugin/block/block/TestXSSTitleBlock.php
@@ -14,7 +14,7 @@ use Drupal\Core\Annotation\Plugin;
  *
  * @Plugin(
  *   id = "test_xss_title",
- *   subject = "<script>alert('XSS subject');</script>",
+ *   admin_label = "<script>alert('XSS subject');</script>",
  *   module = "block_test"
  * )
  */
diff --git a/core/modules/book/lib/Drupal/book/Plugin/block/block/BookNavigationBlock.php b/core/modules/book/lib/Drupal/book/Plugin/block/block/BookNavigationBlock.php
index bbce85c6c33..e81e37b9f50 100644
--- a/core/modules/book/lib/Drupal/book/Plugin/block/block/BookNavigationBlock.php
+++ b/core/modules/book/lib/Drupal/book/Plugin/block/block/BookNavigationBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "book_navigation",
- *   subject = @Translation("Book navigation"),
+ *   admin_label = @Translation("Book navigation"),
  *   module = "book"
  * )
  */
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/block/block/RecentCommentsBlock.php b/core/modules/comment/lib/Drupal/comment/Plugin/block/block/RecentCommentsBlock.php
index 7920a686297..661d6097272 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/block/block/RecentCommentsBlock.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/block/block/RecentCommentsBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *  id = "recent_comments",
- *  subject = @Translation("Recent comments"),
+ *  admin_label = @Translation("Recent comments"),
  *  module = "comment"
  * )
  */
diff --git a/core/modules/forum/lib/Drupal/forum/Plugin/block/block/ActiveTopicsBlock.php b/core/modules/forum/lib/Drupal/forum/Plugin/block/block/ActiveTopicsBlock.php
index f77aea85630..5a31b939856 100644
--- a/core/modules/forum/lib/Drupal/forum/Plugin/block/block/ActiveTopicsBlock.php
+++ b/core/modules/forum/lib/Drupal/forum/Plugin/block/block/ActiveTopicsBlock.php
@@ -15,7 +15,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "forum_active_block",
- *   subject = @Translation("Active forum topics"),
+ *   admin_label = @Translation("Active forum topics"),
  *   module = "forum"
  * )
  */
diff --git a/core/modules/forum/lib/Drupal/forum/Plugin/block/block/NewTopicsBlock.php b/core/modules/forum/lib/Drupal/forum/Plugin/block/block/NewTopicsBlock.php
index 696e07763a9..34b93577345 100644
--- a/core/modules/forum/lib/Drupal/forum/Plugin/block/block/NewTopicsBlock.php
+++ b/core/modules/forum/lib/Drupal/forum/Plugin/block/block/NewTopicsBlock.php
@@ -15,7 +15,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "forum_new_block",
- *   subject = @Translation("New forum topics"),
+ *   admin_label = @Translation("New forum topics"),
  *   module = "forum"
  * )
  */
diff --git a/core/modules/language/lib/Drupal/language/Plugin/Derivative/LanguageBlock.php b/core/modules/language/lib/Drupal/language/Plugin/Derivative/LanguageBlock.php
index 827b9b5c6db..d451b27f4a4 100644
--- a/core/modules/language/lib/Drupal/language/Plugin/Derivative/LanguageBlock.php
+++ b/core/modules/language/lib/Drupal/language/Plugin/Derivative/LanguageBlock.php
@@ -40,7 +40,7 @@ class LanguageBlock implements DerivativeInterface {
     $info = language_types_info();
     foreach (language_types_get_configurable(FALSE) as $type) {
       $this->derivatives[$type] = $base_plugin_definition;
-      $this->derivatives[$type]['subject'] = t('Language switcher (!type)', array('!type' => $info[$type]['name']));
+      $this->derivatives[$type]['admin_label'] = t('Language switcher (!type)', array('!type' => $info[$type]['name']));
       $this->derivatives[$type]['cache'] = DRUPAL_NO_CACHE;
     }
     return $this->derivatives;
diff --git a/core/modules/language/lib/Drupal/language/Plugin/block/block/LanguageBlock.php b/core/modules/language/lib/Drupal/language/Plugin/block/block/LanguageBlock.php
index ec34971c4b0..ff1c83f2076 100644
--- a/core/modules/language/lib/Drupal/language/Plugin/block/block/LanguageBlock.php
+++ b/core/modules/language/lib/Drupal/language/Plugin/block/block/LanguageBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "language_block",
- *   subject = @Translation("Language switcher"),
+ *   admin_label = @Translation("Language switcher"),
  *   module = "language",
  *   derivative = "Drupal\language\Plugin\Derivative\LanguageBlock"
  * )
diff --git a/core/modules/menu/lib/Drupal/menu/Plugin/Derivative/MenuBlock.php b/core/modules/menu/lib/Drupal/menu/Plugin/Derivative/MenuBlock.php
index 6f9b4ac06da..cfa5b63625d 100644
--- a/core/modules/menu/lib/Drupal/menu/Plugin/Derivative/MenuBlock.php
+++ b/core/modules/menu/lib/Drupal/menu/Plugin/Derivative/MenuBlock.php
@@ -23,7 +23,7 @@ class MenuBlock extends SystemMenuBlock {
     // Provide block plugin definitions for all user-defined (custom) menus.
     foreach (menu_get_menus(FALSE) as $menu => $name) {
       $this->derivatives[$menu] = $base_plugin_definition;
-      $this->derivatives[$menu]['subject'] = $name;
+      $this->derivatives[$menu]['admin_label'] = $name;
       $this->derivatives[$menu]['cache'] = DRUPAL_NO_CACHE;
     }
     return $this->derivatives;
diff --git a/core/modules/menu/lib/Drupal/menu/Plugin/block/block/MenuBlock.php b/core/modules/menu/lib/Drupal/menu/Plugin/block/block/MenuBlock.php
index 4298e5e7adf..f38f191bfa7 100644
--- a/core/modules/menu/lib/Drupal/menu/Plugin/block/block/MenuBlock.php
+++ b/core/modules/menu/lib/Drupal/menu/Plugin/block/block/MenuBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "menu_menu_block",
- *   subject = @Translation("Menu"),
+ *   admin_label = @Translation("Menu"),
  *   module = "menu",
  *   derivative = "Drupal\menu\Plugin\Derivative\MenuBlock"
  * )
diff --git a/core/modules/node/lib/Drupal/node/Plugin/block/block/RecentContentBlock.php b/core/modules/node/lib/Drupal/node/Plugin/block/block/RecentContentBlock.php
index 03c3c4398b7..40f7b1139e4 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/block/block/RecentContentBlock.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/block/block/RecentContentBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "node_recent_block",
- *   subject = @Translation("Recent content"),
+ *   admin_label = @Translation("Recent content"),
  *   module = "node"
  * )
  */
diff --git a/core/modules/node/lib/Drupal/node/Plugin/block/block/SyndicateBlock.php b/core/modules/node/lib/Drupal/node/Plugin/block/block/SyndicateBlock.php
index 9caabc397e0..fc506b5f624 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/block/block/SyndicateBlock.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/block/block/SyndicateBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "node_syndicate_block",
- *   subject = @Translation("Syndicate"),
+ *   admin_label = @Translation("Syndicate"),
  *   module = "node"
  * )
  */
diff --git a/core/modules/search/lib/Drupal/search/Plugin/block/block/SearchBlock.php b/core/modules/search/lib/Drupal/search/Plugin/block/block/SearchBlock.php
index 2bfccfd79bb..ffb38016939 100644
--- a/core/modules/search/lib/Drupal/search/Plugin/block/block/SearchBlock.php
+++ b/core/modules/search/lib/Drupal/search/Plugin/block/block/SearchBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "search_form_block",
- *   subject = @Translation("Search form"),
+ *   admin_label = @Translation("Search form"),
  *   module = "search"
  * )
  */
diff --git a/core/modules/shortcut/lib/Drupal/shortcut/Plugin/block/block/ShortcutsBlock.php b/core/modules/shortcut/lib/Drupal/shortcut/Plugin/block/block/ShortcutsBlock.php
index 590ff10aa1c..570c4b65c2e 100644
--- a/core/modules/shortcut/lib/Drupal/shortcut/Plugin/block/block/ShortcutsBlock.php
+++ b/core/modules/shortcut/lib/Drupal/shortcut/Plugin/block/block/ShortcutsBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *  id = "shortcuts",
- *  subject = @Translation("Shortcuts"),
+ *  admin_label = @Translation("Shortcuts"),
  *  module = "shortcut"
  * )
  */
diff --git a/core/modules/statistics/lib/Drupal/statistics/Plugin/block/block/StatisticsPopularBlock.php b/core/modules/statistics/lib/Drupal/statistics/Plugin/block/block/StatisticsPopularBlock.php
index a10f45c29ee..51cfa6753b0 100644
--- a/core/modules/statistics/lib/Drupal/statistics/Plugin/block/block/StatisticsPopularBlock.php
+++ b/core/modules/statistics/lib/Drupal/statistics/Plugin/block/block/StatisticsPopularBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "statistics_popular_block",
- *   subject = @Translation("Popular content"),
+ *   admin_label = @Translation("Popular content"),
  *   module = "statistics"
  * )
  */
diff --git a/core/modules/system/lib/Drupal/system/Plugin/Derivative/SystemMenuBlock.php b/core/modules/system/lib/Drupal/system/Plugin/Derivative/SystemMenuBlock.php
index 81237327351..5b7c40b286b 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Derivative/SystemMenuBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Derivative/SystemMenuBlock.php
@@ -45,7 +45,7 @@ class SystemMenuBlock implements DerivativeInterface {
       $menu = "menu-$menu";
       $this->derivatives[$menu] = $base_plugin_definition;
       $this->derivatives[$menu]['delta'] = $menu;
-      $this->derivatives[$menu]['subject'] = $name;
+      $this->derivatives[$menu]['admin_label'] = $name;
       $this->derivatives[$menu]['cache'] = DRUPAL_NO_CACHE;
     }
     return $this->derivatives;
diff --git a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemHelpBlock.php b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemHelpBlock.php
index 9a4d706d3e9..852b5875a2e 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemHelpBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemHelpBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "system_help_block",
- *   subject = @Translation("System Help"),
+ *   admin_label = @Translation("System Help"),
  *   module = "system"
  * )
  */
diff --git a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMainBlock.php b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMainBlock.php
index 2f10f57ac8c..7583ec08b1b 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMainBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMainBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "system_main_block",
- *   subject = @Translation("Main page content"),
+ *   admin_label = @Translation("Main page content"),
  *   module = "system"
  * )
  */
diff --git a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMenuBlock.php b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMenuBlock.php
index d653fd8e6fb..20a57b441a1 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMenuBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemMenuBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "system_menu_block",
- *   subject = @Translation("System Menu"),
+ *   admin_label = @Translation("System Menu"),
  *   module = "system",
  *   derivative = "Drupal\system\Plugin\Derivative\SystemMenuBlock"
  * )
diff --git a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemPoweredByBlock.php b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemPoweredByBlock.php
index 4749768f8cf..5138b982c65 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemPoweredByBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/block/block/SystemPoweredByBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "system_powered_by_block",
- *   subject = @Translation("Powered by Drupal"),
+ *   admin_label = @Translation("Powered by Drupal"),
  *   module = "system"
  * )
  */
diff --git a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserLoginBlock.php b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserLoginBlock.php
index 08eede6b0dd..cec225d5b84 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserLoginBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserLoginBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "user_login_block",
- *   subject = @Translation("User login"),
+ *   admin_label = @Translation("User login"),
  *   module = "user"
  * )
  */
diff --git a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserNewBlock.php b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserNewBlock.php
index 5c39547e9f8..cf115633d4d 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserNewBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserNewBlock.php
@@ -16,7 +16,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "user_new_block",
- *   subject = @Translation("Who's new"),
+ *   admin_label = @Translation("Who's new"),
  *   module = "user"
  * )
  */
diff --git a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserOnlineBlock.php b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserOnlineBlock.php
index 6a9fb683980..ef6dc68e804 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/block/block/UserOnlineBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/block/block/UserOnlineBlock.php
@@ -19,7 +19,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "user_online_block",
- *   subject = @Translation("Who's online"),
+ *   admin_label = @Translation("Who's online"),
  *   module = "user"
  * )
  */
diff --git a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsBlock.php b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsBlock.php
index 37af0a2f7e3..7d4d161e640 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsBlock.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsBlock.php
@@ -61,7 +61,7 @@ class ViewsBlock implements DerivativeInterface {
             }
           }
           $this->derivatives[$delta] = array(
-            'subject' => $desc,
+            'admin_label' => $desc,
             'cache' => $display->getCacheType()
           );
           $this->derivatives[$delta] += $base_plugin_definition;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
index 9ffa183c373..59865f30240 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsExposedFilterBlock.php
@@ -53,7 +53,7 @@ class ViewsExposedFilterBlock implements DerivativeInterface {
             $delta = $view->id() . '-' . $display->display['id'];
             $desc = t('Exposed form: @view-@display_id', array('@view' => $view->id(), '@display_id' => $display->display['id']));
             $this->derivatives[$delta] = array(
-              'subject' => $desc,
+              'admin_label' => $desc,
               'cache' => DRUPAL_NO_CACHE,
             );
             $this->derivatives[$delta] += $base_plugin_definition;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsBlock.php b/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsBlock.php
index 7cac4f68e95..e4ec9a6bebd 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsBlock.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsBlock.php
@@ -18,7 +18,7 @@ use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
  *
  * @Plugin(
  *   id = "views_block",
- *   subject = @Translation("Views Block"),
+ *   admin_label = @Translation("Views Block"),
  *   module = "views",
  *   derivative = "Drupal\views\Plugin\Derivative\ViewsBlock"
  * )
diff --git a/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsExposedFilterBlock.php b/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsExposedFilterBlock.php
index f74ebf1cf6f..5dfd2c05ba1 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsExposedFilterBlock.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/block/block/ViewsExposedFilterBlock.php
@@ -15,7 +15,7 @@ use Drupal\Core\Annotation\Translation;
  *
  * @Plugin(
  *   id = "views_exposed_filter_block",
- *   subject = @Translation("Views Exposed Filter Block"),
+ *   admin_label = @Translation("Views Exposed Filter Block"),
  *   module = "views",
  *   derivative = "Drupal\views\Plugin\Derivative\ViewsExposedFilterBlock"
  * )