token

Something serving as an indication, proof, or expression of something else; a sign.

Something that signifies or evidences authority, validity, or identity.

A specific instance of a phenomenon or a class of things, as of a linguistic feature in a sample of a person's speech, that can be isolated for study or analysis.

A person who is considered as representative of a social group, such as a lone individual or one of a small number of employees hired primarily to prevent an employer from being accused of discrimination.

A keepsake or souvenir.