Thesaurus

(n) : a flat, normally rectangular piece of stiff paper, plastic etc. especially: one of a pack bearing numbers and symbols used in playing a variety of card games, e.g. a post card, a greeting card (Christmas, birthday etc.,) an identification card, a credit card, a business card, an index card, a baseball card or a warning card; an amusing but slightly foolish person

(v) : to check IDs at a venue with a minimum age requirement; to use the above device or machine