- U.S. Navy. a dark-blue, knitted woolen cap with a turned-up cuff worn by enlisted personnel on duty in cold weather.
- any wool or woollike cap resembling this and sold commercially in various colors.
Origin of watch cap
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for watch cap
"He's a deader," said one of the men, pulling off his watch-cap.
He turned on his light, and quickly gathered together his hockey sweater, his watch-cap, and an old pair of trousers.
- a knitted navy-blue woollen cap worn by seamen in cold weather