1. a man's shirt worn for formal or semiformal evening dress, usually having French cuffs and a stiff or pleated front to be fastened with studs.
2. a man's shirt, buttoning down the front and typically having long sleeves with barrel or French cuffs, and a soft or starched collar, worn with a necktie. Cf. sport shirt.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.