Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Clotheschinstrapchin‧strap /ˈtʃɪnstræp/ noun [countable] DCCa band of cloth under your chin to keep a hat or helmet in placeExamples from the Corpuschinstrap• After a while she noticed his reflected look and looked back, chewing on the leather chinstrap. ldoceonline.com