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
Johnson appeared as a sort-of doctor to help the grandfather after he finally collapses to put a nice capper on the basic, but very effective sketch.
From Los Angeles Times ● Jan. 25, 2026
The capper to the feud between Kendrick Lamar and Drake doesn't involve the "GNX" rapper at all.
From Salon ● Jan. 16, 2025
In Cu. a capper is one who excels.
From Scandinavian influence on Southern Lowland Scotch by Flom, George Tobias
Definitions 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.
