endorser

Definitions

A person or entity that publicly supports or recommends a product, service, or candidate.

A person who signs a document, such as a check or contract, to authorize or validate it.

Examples

The celebrity became a prominent endorser of the new skincare line after seeing its positive results.

As a trusted endorser of the political candidate, the senator spoke at several rallies to boost public support.

Synonyms

advocate supporter sponsor promoter champion backer proponent

Antonyms

critic opponent detractor adversary challenger objector dissenting voice