The Collaborative International Dictionary of English v.0.48:
hairpiece \hair"piece`\ n. a covering or bunch of human or artificial hair used for disguise or adornment; a toupee. Syn: false hair, postiche, toupee. [WordNet 1.5]WordNet (r) 3.0 (2006):
hairpiece n 1: a covering or bunch of human or artificial hair used for disguise or adornment [syn: hairpiece, false hair, postiche]