watch cap

noun

1. U.S. Navy.,  a dark-blue, knitted woolen cap with a turned-up cuff worn by enlisted personnel on duty in cold weather.

2. any wool or woollike cap resembling this and sold commercially in various colors.

watch cap

noun

1. a knitted navy-blue woollen cap worn by seamen in cold weather

Word History and Origins

Origin of watch cap¹

First recorded in 1885–90