/ˈdrɔ:strɪŋ ||; ˈdrɔˌstrɪŋ/noun [C] a piece of string that is sewn inside the material at the top of a bag, pair of trousers, etc that can be pulled tighter in order to make the opening smaller （装于袋口、裤腰等上的）束带，拉绳: The trousers fasten with a drawstring. 裤子用束带束紧。 ☞picture at button 见button插图