thoroughly
Americanadverb
-
in a thorough manner or degree; completely and carefully.
We will review the data thoroughly.
-
perfectly; utterly.
We thoroughly enjoyed the play.
Etymology
Origin of thoroughly
First recorded in 1450–1500; thorough ( def. ) + -ly ( def. )
Explanation
Thoroughly means exhaustively and completely. No matter how thoroughly you clean every carpet, shelf, and windowpane in a house, there is always more dust to be found. Thorough comes from the word through, and originally meant passing completely through something. We use thorough and thoroughly now to show that we have really been as meticulous as possible in a given task. If a detective interviews everyone present at the scene of the crime, collects all the biological evidence, and takes pictures from every angle, then we can say she investigated the crime thoroughly.
Vocabulary lists containing thoroughly
Legend
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Out of the Dust
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myPerspectives 7.5
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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.
The view of Bitcoin as a hedge against volatility has been out of favor for a while but ongoing developments in the Middle East have thoroughly debunked it.
From Barron's • Jun. 1, 2026
The proposed rule states that “plan fiduciaries would need to objectively, thoroughly, and analytically consider, and make determinations on factors including performance, fees, liquidity, valuation, performance benchmarks, and complexity,” the department said.
From MarketWatch • Jun. 1, 2026
Or maybe Becerra was, indeed, a feckless, flailing and thoroughly awful Cabinet member, deserving of scorn and shame.
From Los Angeles Times • May 31, 2026
It is that love for the United States that thoroughly frustrates those around the world who thought our country represented freedom and diversity.
From Salon • May 22, 2026
They drank healths, told stories, sang songs, ‘reminisced’, as the old folks say, and had a thoroughly good time.
From "Little Women" by Louisa May Alcott
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.
