CBAT is an acronym that stands for Closed Beta Test. It refers to the testing phase before a product or service is publicly released. During this time, a select group of users are invited to test the product and provide feedback to the developers. This feedback is used by the developers to improve and refine the product before its official launch. Synonyms for CBAT include beta testing, closed testing, and private testing. Other similar terms that can be used interchangeably with CBAT are alpha testing, open beta testing, and public beta testing. All of these terms refer to the testing phase of a product before it is launched to the public.