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View synonyms for sharp as a tack
sharp as a tack
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Idioms and Phrases
Also, sharp as a razor . Mentally acute. For example, She's very witty—she's sharp as a tack . These similes are also used literally to mean “having a keen cutting edge” and have largely replaced the earlier sharp as a needle or thorn . The first dates from about 1900, the variant from the mid-1800s.Advertisement
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.
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