detect
Americanverb (used with object)
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to discover or catch (a person) in the performance of some act.
to detect someone cheating.
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to discover the existence of.
to detect the odor of gas.
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to find out the true character or activity of.
to detect a spy.
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Telecommunications.
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to rectify alternating signal currents in a radio receiver.
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to demodulate.
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verb
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to perceive or notice
to detect a note of sarcasm
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to discover the existence or presence of (esp something likely to elude observation)
to detect alcohol in the blood
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to extract information from (an electromagnetic wave)
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obsolete to reveal or expose (a crime, criminal, etc)
Usage
What are other ways to say detect?
To detect is to discover something hidden or unknown. When should you use detect over learn, discover, or ascertain? Find out on Thesaurus.com.
Other Word Forms
- detectability noun
- detectable adjective
- detecter noun
- detectibility noun
- detectible adjective
- predetect verb (used with object)
- undetectable adjective
- undetectably adverb
- undetected adjective
- undetectible adjective
Etymology
Origin of detect
First recorded in 1400–50; late Middle English, from Latin dētēctus “discovered,” past participle of dētegere “to uncover, discover,” from dē- de- + tegere “to cover”; see also thatch
Explanation
The verb detect means to discover or observe the existence of something. If you walk into your house and detect the odor of burnt food, you can deduce from the evidence that you will be going out to dinner tonight! The verb detect comes from the Latin word detegere, which literally means "to uncover" — or more figuratively, to discover. You may detect the presence of a new dog in your house if you note a water bowl, chew toys, and grooming tools. Of course, the large woofing beast that greeted you at the door with a wagging tail might be a big clue as well.
Vocabulary lists containing detect
Jim Burke's Academic Vocabulary List
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List 9
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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.
They are difficult to detect, highly accurate and cost hundreds of dollars a piece.
From The Wall Street Journal • May 1, 2026
But these standard scans do not always pick up on the disease and mainly detect changes that often appear with more advanced diseases, says Dr Tatjana Gibbons, lead researcher on the study.
From BBC • Apr. 29, 2026
The technique uses CT scans combined with a molecular tracer to detect areas of early endometriosis, which is often missed by conventional scans.
From BBC • Apr. 29, 2026
"By combining large-scale data with computational methods, we were able to uncover patterns in dream content that were previously difficult to detect."
From Science Daily • Apr. 28, 2026
It is of course the abundance and extreme durability of atoms that makes them so useful, and the tininess that makes them so hard to detect and understand.
From "A Short History of Nearly Everything" by Bill Bryson
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.
