diff --git a/packages/kbn-check-mappings-update-cli/current_fields.json b/packages/kbn-check-mappings-update-cli/current_fields.json
index 9cecd6df6d6f6..59cd87288e8ec 100644
--- a/packages/kbn-check-mappings-update-cli/current_fields.json
+++ b/packages/kbn-check-mappings-update-cli/current_fields.json
@@ -301,7 +301,8 @@
     "metrics",
     "name",
     "staticFields",
-    "type"
+    "type",
+    "version"
   ],
   "entity-discovery-api-key": [
     "apiKey"
diff --git a/packages/kbn-check-mappings-update-cli/current_mappings.json b/packages/kbn-check-mappings-update-cli/current_mappings.json
index f0df154b4f012..47602ca181b5e 100644
--- a/packages/kbn-check-mappings-update-cli/current_mappings.json
+++ b/packages/kbn-check-mappings-update-cli/current_mappings.json
@@ -1028,6 +1028,9 @@
       },
       "type": {
         "type": "keyword"
+      },
+      "version": {
+        "type": "keyword"
       }
     }
   },
diff --git a/src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts b/src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts
index 73f8b7f9e9313..51c06947d224b 100644
--- a/src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts
+++ b/src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts
@@ -88,7 +88,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "endpoint:unified-user-artifact-manifest": "71c7fcb52c658b21ea2800a6b6a76972ae1c776e",
         "endpoint:user-artifact-manifest": "1c3533161811a58772e30cdc77bac4631da3ef2b",
         "enterprise_search_telemetry": "9ac912e1417fc8681e0cd383775382117c9e3d3d",
-        "entity-definition": "33fe0194bd896f0bfe479d55f6de20f8ba1d7713",
+        "entity-definition": "331a2ba0ee9f24936ef049683549c8af7e46f03a",
         "entity-discovery-api-key": "c267a65c69171d1804362155c1378365f5acef88",
         "epm-packages": "8042d4a1522f6c4e6f5486e791b3ffe3a22f88fd",
         "epm-packages-assets": "7a3e58efd9a14191d0d1a00b8aaed30a145fd0b1",
diff --git a/x-pack/packages/kbn-entities-schema/src/schema/common.ts b/x-pack/packages/kbn-entities-schema/src/schema/common.ts
index b0d4b7247d12c..bb9d07b1957f4 100644
--- a/x-pack/packages/kbn-entities-schema/src/schema/common.ts
+++ b/x-pack/packages/kbn-entities-schema/src/schema/common.ts
@@ -96,3 +96,9 @@ export const identityFieldsSchema = z
     optional: z.boolean(),
   })
   .or(z.string().transform((value) => ({ field: value, optional: false })));
+
+const semVerRegex = new RegExp(/^[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}$/);
+export const semVerSchema = z.string().refine((maybeSemVer) => semVerRegex.test(maybeSemVer), {
+  message:
+    'The string does use the Semantic Versioning (Semver) format of {major}.{minor}.{patch} (e.g., 1.0.0), ensure each part contains only digits.',
+});
diff --git a/x-pack/packages/kbn-entities-schema/src/schema/entity_definition.ts b/x-pack/packages/kbn-entities-schema/src/schema/entity_definition.ts
index 15f3e98582c97..8fee16117b9c6 100644
--- a/x-pack/packages/kbn-entities-schema/src/schema/entity_definition.ts
+++ b/x-pack/packages/kbn-entities-schema/src/schema/entity_definition.ts
@@ -13,10 +13,12 @@ import {
   filterSchema,
   durationSchema,
   identityFieldsSchema,
+  semVerSchema,
 } from './common';
 
 export const entityDefinitionSchema = z.object({
   id: z.string().regex(/^[\w-]+$/),
+  version: semVerSchema,
   name: z.string(),
   description: z.optional(z.string()),
   type: z.string(),
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/built_in/services.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/built_in/services.ts
index 02c69771ed24f..29d501de8312f 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/built_in/services.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/built_in/services.ts
@@ -10,6 +10,7 @@ import { BUILT_IN_ID_PREFIX } from './constants';
 
 export const builtInServicesEntityDefinition: EntityDefinition = entityDefinitionSchema.parse({
   id: `${BUILT_IN_ID_PREFIX}services`,
+  version: '0.1.0',
   name: 'Services from logs',
   type: 'service',
   managed: true,
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/create_and_install_ingest_pipeline.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/create_and_install_ingest_pipeline.ts
index ce8515a5e31db..23feb84fa5336 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/create_and_install_ingest_pipeline.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/create_and_install_ingest_pipeline.ts
@@ -28,6 +28,9 @@ export async function createAndInstallHistoryIngestPipeline(
         esClient.ingest.putPipeline({
           id: historyId,
           processors: historyProcessors,
+          _meta: {
+            definitionVersion: definition.version,
+          },
         }),
       { logger }
     );
@@ -51,6 +54,9 @@ export async function createAndInstallLatestIngestPipeline(
         esClient.ingest.putPipeline({
           id: latestId,
           processors: latestProcessors,
+          _meta: {
+            definitionVersion: definition.version,
+          },
         }),
       { logger }
     );
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/helpers/fixtures/entity_definition.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/helpers/fixtures/entity_definition.ts
index b0d47a9044d4a..137560df13385 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/helpers/fixtures/entity_definition.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/helpers/fixtures/entity_definition.ts
@@ -8,6 +8,7 @@
 import { entityDefinitionSchema } from '@kbn/entities-schema';
 export const entityDefinition = entityDefinitionSchema.parse({
   id: 'admin-console-services',
+  version: '999.999.999',
   name: 'Services for Admin Console',
   type: 'service',
   indexPatterns: ['kbn-data-forge-fake_stack.*'],
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_history_processors.test.ts.snap b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_history_processors.test.ts.snap
index c646694ffef5e..eb74937a7e8c8 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_history_processors.test.ts.snap
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_history_processors.test.ts.snap
@@ -20,6 +20,18 @@ Array [
       "value": "admin-console-services",
     },
   },
+  Object {
+    "set": Object {
+      "field": "entity.definitionVersion",
+      "value": "999.999.999",
+    },
+  },
+  Object {
+    "set": Object {
+      "field": "entity.schemaVersion",
+      "value": "v1",
+    },
+  },
   Object {
     "set": Object {
       "field": "entity.displayName",
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_latest_processors.test.ts.snap b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_latest_processors.test.ts.snap
index 33d8504d937b2..c66bd8337da47 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_latest_processors.test.ts.snap
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/__snapshots__/generate_latest_processors.test.ts.snap
@@ -20,6 +20,18 @@ Array [
       "value": "admin-console-services",
     },
   },
+  Object {
+    "set": Object {
+      "field": "entity.definitionVersion",
+      "value": "999.999.999",
+    },
+  },
+  Object {
+    "set": Object {
+      "field": "entity.schemaVersion",
+      "value": "v1",
+    },
+  },
   Object {
     "script": Object {
       "source": "if (ctx.entity?.metadata?.tags.data != null) {
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_history_processors.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_history_processors.ts
index eea33d9adda79..b273be780910b 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_history_processors.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_history_processors.ts
@@ -6,6 +6,7 @@
  */
 
 import { EntityDefinition } from '@kbn/entities-schema';
+import { ENTITY_SCHEMA_VERSION_V1 } from '../../../../common/constants_entities';
 import { generateHistoryIndexName } from '../helpers/generate_component_id';
 
 function createIdTemplate(definition: EntityDefinition) {
@@ -62,6 +63,18 @@ export function generateHistoryProcessors(definition: EntityDefinition) {
         value: definition.id,
       },
     },
+    {
+      set: {
+        field: 'entity.definitionVersion',
+        value: definition.version,
+      },
+    },
+    {
+      set: {
+        field: 'entity.schemaVersion',
+        value: ENTITY_SCHEMA_VERSION_V1,
+      },
+    },
     {
       set: {
         field: 'entity.displayName',
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_latest_processors.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_latest_processors.ts
index 1574659723601..056fb043ab05c 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_latest_processors.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/ingest_pipeline/generate_latest_processors.ts
@@ -6,6 +6,7 @@
  */
 
 import { EntityDefinition } from '@kbn/entities-schema';
+import { ENTITY_SCHEMA_VERSION_V1 } from '../../../../common/constants_entities';
 import { generateLatestIndexName } from '../helpers/generate_component_id';
 
 function mapDestinationToPainless(destination: string) {
@@ -56,6 +57,18 @@ export function generateLatestProcessors(definition: EntityDefinition) {
         value: definition.id,
       },
     },
+    {
+      set: {
+        field: 'entity.definitionVersion',
+        value: definition.version,
+      },
+    },
+    {
+      set: {
+        field: 'entity.schemaVersion',
+        value: ENTITY_SCHEMA_VERSION_V1,
+      },
+    },
     ...(definition.staticFields != null
       ? Object.keys(definition.staticFields).map((field) => ({
           set: { field, value: definition.staticFields![field] },
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/install_entity_definition.test.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/install_entity_definition.test.ts
index d246b3f4f5606..6e7080c6364b7 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/install_entity_definition.test.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/install_entity_definition.test.ts
@@ -38,10 +38,16 @@ const assertHasCreatedDefinition = (
   expect(esClient.ingest.putPipeline).toBeCalledWith({
     id: generateHistoryIngestPipelineId(builtInServicesEntityDefinition),
     processors: expect.anything(),
+    _meta: {
+      definitionVersion: '0.1.0',
+    },
   });
   expect(esClient.ingest.putPipeline).toBeCalledWith({
     id: generateLatestIngestPipelineId(builtInServicesEntityDefinition),
     processors: expect.anything(),
+    _meta: {
+      definitionVersion: '0.1.0',
+    },
   });
 
   expect(esClient.transform.putTransform).toBeCalledTimes(2);
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_history_transform.test.ts.snap b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_history_transform.test.ts.snap
index bbea064c9b7ec..961f57045a5a2 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_history_transform.test.ts.snap
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_history_transform.test.ts.snap
@@ -2,6 +2,9 @@
 
 exports[`generateHistoryTransform(definition) should generate a valid latest transform 1`] = `
 Object {
+  "_meta": Object {
+    "definitionVersion": "999.999.999",
+  },
   "defer_validation": true,
   "dest": Object {
     "index": ".entities.v1.history.noop",
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_latest_transform.test.ts.snap b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_latest_transform.test.ts.snap
index d9dff5aa54c2e..aa0b2c7e871d2 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_latest_transform.test.ts.snap
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/__snapshots__/generate_latest_transform.test.ts.snap
@@ -2,6 +2,9 @@
 
 exports[`generateLatestTransform(definition) should generate a valid latest transform 1`] = `
 Object {
+  "_meta": Object {
+    "definitionVersion": "999.999.999",
+  },
   "defer_validation": true,
   "dest": Object {
     "index": ".entities.v1.latest.noop",
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_history_transform.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_history_transform.ts
index 2fd430f142b72..4467c2425976c 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_history_transform.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_history_transform.ts
@@ -34,6 +34,9 @@ export function generateHistoryTransform(
 
   return {
     transform_id: generateHistoryTransformId(definition),
+    _meta: {
+      definitionVersion: definition.version,
+    },
     defer_validation: true,
     source: {
       index: definition.indexPatterns,
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_latest_transform.ts b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_latest_transform.ts
index 9f19f083291f2..e52aa10e0820d 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_latest_transform.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/lib/entities/transform/generate_latest_transform.ts
@@ -25,6 +25,9 @@ export function generateLatestTransform(
 ): TransformPutTransformRequest {
   return {
     transform_id: generateLatestTransformId(definition),
+    _meta: {
+      definitionVersion: definition.version,
+    },
     defer_validation: true,
     source: {
       index: `${generateHistoryIndexName(definition)}.*`,
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/saved_objects/entity_definition.ts b/x-pack/plugins/observability_solution/entity_manager/server/saved_objects/entity_definition.ts
index 5ddba63b7ad07..b4bf24580d632 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/saved_objects/entity_definition.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/saved_objects/entity_definition.ts
@@ -18,6 +18,7 @@ export const entityDefinition: SavedObjectsType = {
     dynamic: false,
     properties: {
       id: { type: 'keyword' },
+      version: { type: 'keyword' },
       name: { type: 'text' },
       description: { type: 'text' },
       type: { type: 'keyword' },
@@ -37,4 +38,16 @@ export const entityDefinition: SavedObjectsType = {
       return `EntityDefinition: [${savedObject.attributes.name}]`;
     },
   },
+  modelVersions: {
+    '1': {
+      changes: [
+        {
+          type: 'mappings_addition',
+          addedMappings: {
+            version: { type: 'keyword' },
+          },
+        },
+      ],
+    },
+  },
 };
diff --git a/x-pack/plugins/observability_solution/entity_manager/server/templates/components/entity.ts b/x-pack/plugins/observability_solution/entity_manager/server/templates/components/entity.ts
index 88c01b113c0e4..fd7e82749f069 100644
--- a/x-pack/plugins/observability_solution/entity_manager/server/templates/components/entity.ts
+++ b/x-pack/plugins/observability_solution/entity_manager/server/templates/components/entity.ts
@@ -41,6 +41,14 @@ export const entitiesEntityComponentTemplateConfig: ClusterPutComponentTemplateR
               ignore_above: 1024,
               type: 'keyword',
             },
+            definitionVersion: {
+              ignore_above: 1024,
+              type: 'keyword',
+            },
+            schemaVersion: {
+              ignore_above: 1024,
+              type: 'keyword',
+            },
             lastSeenTimestamp: {
               type: 'date',
             },