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.
“This should put a capper, in our opinion, on blue-sky hopes for substantial multiple expansion,” he wrote.
From MarketWatch • Feb. 5, 2026
The capper came on Monday when Liverpool shelled out around $170 million for Alexander Isak, a 26-year-old from Sweden, signed from Newcastle, another top-five club.
From The Wall Street Journal • Sep. 2, 2025
The capper to the feud between Kendrick Lamar and Drake doesn't involve the "GNX" rapper at all.
From Salon • Jan. 16, 2025
But Leonard’s last shot was off target, and James found Reddish for the capper to the delight of the thousands of Lakers fans in attendance at a “road” game.
From Seattle Times • Feb. 28, 2024
It is amazing the many who were willing to play the part of capper in this game.
From Watch Yourself Go By by Warden, Ben W.
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.
