detector

noun

de·​tec·​tor di-ˈtek-tər 

: 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

Synonyms of detector

• sensor

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

Treat those checks as part of your review process rather than a guarantee that the text will pass other detectors. — Stackcommerce Team, PC Magazine, 21 Oct. 2026

On July 2, 2025, a burst with energy equivalent to 1,000 suns blazing for 10 billion years lit up Fermi’s detectors, heading from a dusty galaxy about eight billion light-years from Earth. — Robin George Andrews, Scientific American, 20 Oct. 2026

Now, the company has launched a free online version of its detector, letting users across all the major streamers scope out slop in a few simple steps. — Jessica Sager, Time, 15 Oct. 2026

Swipe-pay is vulnerable to theft because the magnetic stripe behind cards does a poor job of securing personal information, according to Scott Schober, the CEO of Berkeley Varitronics Systems who has invented several skimming detectors. — Juliana Kim, NPR, 14 Oct. 2026

Word History

First Known Use

1541, in the meaning defined above

Phrases Containing detector

• lie detector
• metal detector
• radar detector
• smoke detector

Rhymes for detector

• bisector
• collector
• connector
• corrector
• defector
• deflector
• director
• dissector
• effector
• ejector
• elector
• erector

Kids Definition

detector

noun

de·​tec·​tor di-ˈtek-tər 

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 

: one that detects

especially : a device for detecting the presence of electromagnetic waves or of radioactivity