detector

noun

de·​tec·​tor di-ˈtek-tər How to pronounce detector (audio)
: one that detects: such as
a
: a device for detecting the presence of electromagnetic waves or of radioactivity
b
: a rectifier of high-frequency current used especially for extracting the intelligence from a radio signal

Examples of detector in a Sentence

using metal detectors to improve safety at airports a motion detector to thwart burglaries
Recent Examples on the Web If the Custom Home price is simply too high for you, ADT also has a Command System Starter Kit that includes a Command panel, three door or window sensors, and a motion detector. PCMAG, 10 Apr. 2024 By nightfall, the street was crowded with apparently hot merchandise: carbon-monoxide detectors, Leviton tamper-resistant outlets, and, notably, hundreds of heavy spools of copper and electrical wiring, the most expensive of which can retail for more than seven hundred dollars. Paige Williams, The New Yorker, 18 Mar. 2024 After the incident, the superintendent of Utica schools removed the detector from the high school. Caroline Beck, The Indianapolis Star, 12 Mar. 2024 Bailey further cited his conversations with leaders from other U.S. cities and other reports questioning the effectiveness of gunshot detectors. Sarah Nelson, The Indianapolis Star, 29 Mar. 2024 This lets the detectors quickly determine if a metal item is a cell phone or a gun. Oscar Gonzalez / Gizmodo, Quartz, 29 Mar. 2024 Specialists will verify gunshot detector readings by using cameras in the area or confirming with dispatch that a related call was placed. The Arizona Republic, 26 Mar. 2024 The detector can be controlled with an app and has an adjustable alarm. Nora Colomer, Fox News, 26 Mar. 2024 The robot ball’s LED matrix display is programmable to a variety of icons of your kiddo’s choice, such as a heart or lightning bolt, and is packed with customizable sensors, like infrared detectors, that tell the robot when something is nearby. Julie Evans, Parents, 12 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'detector.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1541, in the meaning defined above

Time Traveler
The first known use of detector was in 1541

Dictionary Entries Near detector

Cite this Entry

“Detector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/detector. Accessed 26 Apr. 2024.

Kids Definition

detector

noun
de·​tec·​tor di-ˈtek-tər How to pronounce detector (audio)
1
: one that detects or warns
a smoke detector
2
: a device in a radio receiver for changing the high-frequency current of radio waves into current that can vibrate a loudspeaker to reproduce the original sound

Medical Definition

detector

noun
de·​tec·​tor di-ˈtek-tər How to pronounce detector (audio)
: one that detects
especially : a device for detecting the presence of electromagnetic waves or of radioactivity

More from Merriam-Webster on detector

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!