de·​tec·​tion | \ di-ˈtek-shən How to pronounce detection (audio) \

Definition of detection

1 : the act of detecting : the state or fact of being detected
2 : the process of demodulating

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Examples of detection in a Sentence

I don't know how the errors managed to avoid detection for so long. my detection of the scent of baked apple pie led me to the kitchen

Recent Examples on the Web

Border Patrol personnel, detection technology and physical barriers have increased in that time. Christopher Rugaber, The Seattle Times, "AP FACT CHECK: Trump’s speech exaggerates border peril," 6 Feb. 2019 This robot vac offers the same smart obstacle detection technology and even more power than leading vacuums at a fraction of the price. Popular Mechanics, "10 Great Home Gifts at Black Friday Prices," 16 Nov. 2018 The sound-detection technology was explained in a blog post about Alexa’s expanding AI-capabilities. Dami Lee, The Verge, "You can now get Alexa to use its inside voice with Whisper Mode," 18 Oct. 2018 But Hartsfield-Jackson does not have motion-detection technology that would trigger an alarm if someone climbed a fence. Kelly Yamanouchi, ajc, "Atlanta airport: Hartsfield-Jackson fence breach raises security concerns," 28 June 2018 Last year, the American Petroleum Institute announced a voluntary program through which companies could employ advanced leak detection technology and replace older equipment prone to methane leaks. James Osborne, Houston Chronicle, "With satellite in development, environmentalists enter the space age," 11 Apr. 2018 The duo are using detection technology from Exacter, Inc. and scaling it down for electrical distribution and transmission line applications. Megan Becka,, "University of Akron professors develop sensors to predict, detect, prevent electrical power outages," 10 Apr. 2018 The gunshot detection technology, ShotSpotter, covers the area of the shooting, but Saunders said it was not activated in this incident. Cameron Knight,, "Man in his 20s dead after Avondale shooting," 3 Apr. 2018 The Apple watch also has accelerometers for built in fall detection. James Lynch, Popular Mechanics, "Buyer's Guide: How To Decide Between an Apple Watch and a Fitbit," 20 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'detection.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of detection

15th century, in the meaning defined at sense 1

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Statistics for detection

Last Updated

24 May 2019

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The first known use of detection was in the 15th century

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English Language Learners Definition of detection

: the act or process of discovering, finding, or noticing something


de·​tec·​tion | \ di-ˈtek-shən How to pronounce detection (audio) \

Kids Definition of detection

: the act of learning that something or someone is or was there : discovery The clever thief escaped detection.

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