capper
Americannoun
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a person or thing that caps.
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Also called topper. something that completes or adds to what has preceded it.
The capper was that we didn't know each other after all.
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Slang. an informer, especially for gamblers.
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Slang. a by-bidder at an auction.
Etymology
Origin of capper
1350–1400 (for sense “cap maker”); 1580–90 capper ( for def. 1 ); Middle English; see cap 1, -er 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A second straight Knicks loss would have been a brutal capper to a nasty 48 hours in New York.
From The Wall Street Journal ● Jun. 11, 2026
“This should put a capper, in our opinion, on blue-sky hopes for substantial multiple expansion,” he wrote.
From MarketWatch ● Feb. 5, 2026
That might not move Ted Sarandos, but I’m sure he picked up a few votes with that capper.
From Los Angeles Times ● Jan. 19, 2026
The capper came when the 49ers' running back Roger Craig swept around left end and into the usual chaotic pile out of bounds.
From Salon ● Oct. 1, 2023
He did the playing, and I was the capper.
From Forty Years a Gambler on the Mississippi by George H. Devol
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
