Definitions:
a thing serving as a visible or tangible representation of a fact, quality, feeling, etc.

a voucher that can be exchanged for goods or services, typically one given as a gift or forming part of a promotional offer

an individual occurrence of a linguistic unit in speech or writing.

a sequence of bits passed continuously between nodes in a fixed order and enabling a node to transmit information.

a member of a minority group included in an otherwise homogeneous set of people in order to give the appearance of diversity

done for the sake of appearances or as a symbolic gesture