# Create an Identifier Definition

`CreateIdentifierDefinition`

`POST /api/identifierdefinitions`

- [OpenAPI fragment](https://www.lusid.com/docs/api/lusid/endpoints/identifier-definitions/CreateIdentifierDefinition.json)
- [Rendered page](https://www.lusid.com/docs/api/lusid/endpoints/identifier-definitions/CreateIdentifierDefinition)

Define a new Identifier Definition

## Referenced schemas

- [CreateIdentifierDefinitionRequest](https://www.lusid.com/docs/api/lusid/schemas/CreateIdentifierDefinitionRequest.txt)
- [IdentifierDefinition](https://www.lusid.com/docs/api/lusid/schemas/IdentifierDefinition.txt)

[< Identifier Definitions](https://www.lusid.com/docs/api/lusid/endpoints/identifier-definitions/llms.txt)