STOPPER

I. noun Date: 15th century one that brings to a halt or causes to stop operating or functioning ; check : as, a playing card that will stop the running of a suit, a baseball pitcher depended on to win important games or to stop a losing streak, one that closes, shuts, or fills up, II. transitive verb (~ed; ~ing) Date: circa 1769 to close or secure with or as if with a ~