Definition of showstopper
1
: an act, song, or performer that wins applause so prolonged as to interrupt a performance
2
: something or someone exceptionally arresting or attractive
the gold crown was the showstopper of the exhibition
3
: one that stops or could stop the progress, operation, or functioning of something
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Merriam-Webster unabridged
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Time Traveler for showstopper
The first known use of showstopper was in 1916
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