n. [ capitalized ] [ shortened form of identification. ] any document testifying to the identity of the bearer, especially a card or badge. Syn. -- ID. [ WordNet 1.5 ]
[ phonetic, from I owe you. ] A paper having on it these letters, with a sum named, and duly signed; -- in use in England as an acknowledgment of a debt, and taken as evidence thereof, but not amounting to a promissory note; a due bill. Wharton. Story. [ 1913 Webster ]
n. a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100). Syn. -- intelligence quotient, IQ. [ WordNet 1.5 ]