"stopper" in the noun sense
1. show-stopper, showstopper, stopper
an act so striking or impressive that the show must be delayed until the audience quiets down
2. conversation stopper, stopper
a remark to which there is no polite conversational reply
3. stopper
bridge) a playing card with a value sufficiently high to insure taking a trick in a particular suit
"if my partner has a spade stopper I can bid no trump"
4. plug, stopper, stopple
blockage consisting of an object designed to fill a hole tightly
"stopper" in the verb sense
1. stopper, stopple
close or secure with or as if with a stopper
"She stoppered the wine bottle"
"The mothers stoppered their babies' mouths with pacifiers"
Source: WordNet® (An amazing lexical database of English)
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