# Entity definitions

Use these endpoints to manage entity definitions.

 - [GET /api/entitydefinitions](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/entitydefinitions.md): Lists all entity definitions.
 - [GET /api/entitydefinitions/{name}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/entitydefinitionbyname.md): Retrieves an entity definition using its name, with options to include conditional members, load permissions, and exclude light entity definitions.
 - [POST /api/entitydefinitions/{name}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/addentitydefinition.md): Creates a new entity definition with the provided details.
 - [PUT /api/entitydefinitions/{name}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/updateentitydefinition.md): Updates an entity definition with the details provided.
 - [DELETE /api/entitydefinitions/{name}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/deleteentitydefinitionbyname.md): Removes the entity definition with a specific name.
 - [GET /api/entitydefinitions/name/{name}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/entitydefinitionbynamev2.md): Retrieves an entity definition by its name (V2 endpoint).
 - [GET /api/entitydefinitions/{id}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/entitydefinitionbyid.md): Retrieves an entity definition by its ID, with options to include conditional members, load permissions, and exclude light entity definitions.
 - [DELETE /api/entitydefinitions/{id}](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/deleteentitydefinitionbyid.md): Removes the entity definition identified by the given ID.
 - [POST /api/entitydefinitions/{name}/impact](https://api-docs.sitecore.com/ch/entity-definitions-api/entity-definitions/calculategraphimpact.md): Submits a modified version of an entity definition and returns an analysis of the impact those changes would have compared to the current definition. Used to preview the effects of schema changes befo