detect

verb

de·​tect di-ˈtekt How to pronounce detect (audio)
dē-
detected; detecting; detects

transitive verb

1
: to discover the true character of
detecting drug smugglers
2
: to discover or determine the existence, presence, or fact of
detect alcohol in the blood
Do I detect a note of sarcasm in your voice?
3

intransitive verb

: to work as a detective
detectability noun
detectable adjective

Examples of detect in a Sentence

The test is used to detect the presence of alcohol in the blood. This type of cancer is difficult to detect in its early stages.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This Navfalcon Hidden Camera Detector has earned a permanent spot in my travel bag; this gadget picks up the radio frequency (RF) signals that are emitted by cameras and alerts you when these wireless signals have been detected. Amelia McBride, Travel + Leisure, 26 Oct. 2025 Developed in collaboration with firefighters and landowners, Seneca claims its scalable aerial units will redefine how wildfires are detected, controlled, and contained in an era of growing climate risk. Jijo Malayil, Interesting Engineering, 25 Oct. 2025 Dogs trained to detect the scent of explosives assisted alongside bomb disposal experts from the Independent Counter-Terrorism Unit of the Police in Katowice at the scene. Latoya Gayle, PEOPLE, 25 Oct. 2025 Strong antivirus software can detect unusual behavior, protect against ransomware and alert you in real time if something attempts to access your data without permission. Kurt Knutsson, FOXNews.com, 24 Oct. 2025 See All Example Sentences for detect

Word History

Etymology

Middle English, from Latin detectus, past participle of detegere to uncover, detect, from de- + tegere to cover — more at thatch

First Known Use

1574, in the meaning defined at transitive sense 1

Time Traveler
The first known use of detect was in 1574

Browse Nearby Words

Cite this Entry

“Detect.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/detect. Accessed 29 Oct. 2025.

Kids Definition

detect

verb
de·​tect di-ˈtekt How to pronounce detect (audio)
: to discover the nature, existence, presence, or fact of
detect the approach of an airplane
detectable adjective
detection
-ˈtek-shən
noun

More from Merriam-Webster on detect

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