Definition of detector noun from the Oxford Advanced Learner's Dictionary

  

detector

 noun
noun
BrE BrE//dɪˈtektə(r)//
 
; NAmE NAmE//dɪˈtektər//
 
 
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a piece of equipment for discovering the presence of something, such as metal, smoke, explosives or changes in pressure or temperature a smoke detector
See the Oxford Advanced American Dictionary entry: detector