n. & v.
--n.
1. a plug for closing a bottle etc.
2 a person or thing that stops something.
3 Naut. a rope or clamp etc. for checking and holding a rope cable or chain cable.
--v.tr. close or secure with a stopper.
Phrases and idioms:
put a stopper on
1. put an end to (a thing).
2 keep (a person) quiet.