> For the complete documentation index, see [llms.txt](https://dev.ucommerce.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.ucommerce.net/readme/definitions.md).

# Definitions

A lot of the business objects in Ucommerce are based on definitions, which are also referred to as dynamic entities. This article will cover how to work with definitions to make your store more flexible.

## List of definition-based entities

The definition-based entities in Ucommerce are:

* Store
* Catalog
* Category
* Product
* Promotion
* Payment method
* Shipping method
* Order/Cart, as they share a definition
* Criterion
* Discount