From Longman Dictionary of Contemporary Englishberetbe‧ret /ˈbereɪ $ bəˈreɪ/ noun [countable] 
DCCa round cap with a tight band around the head and a soft loose top part
DCCa round cap with a tight band around the head and a soft loose top partExamples from the Corpus
beret• Sitting in Les Deux Magots wearing a beret is not necessarily being a critical learner.• This mournfully bright menial Val wore high heels and a black beret.• He has made a few concessions to fashion, however, notably a black beret.• The first showed three soldiers in the cockpit of an armoured car, two with helmets, one with a black beret.• The cherry berets made meticulous house-searches, even digging up the floors of some places, going into roof spaces with torches.• But the unit will retain a distinctive identity by having tan berets.• Antoinette wore her new blue suit and white beret.Origin beret (1800-1900) French béret, from Provençal berret 