'Detector' definitions:

Definition of 'detector'

From: WordNet
noun
Any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner [syn: detector, sensor, sensing element]
noun
Rectifier that extracts modulation from a radio carrier wave [syn: detector, demodulator]
noun
Electronic equipment that detects the presence of radio signals or radioactivity

Definition of 'Detector'

From: GCIDE
  • Detector \De*tect"or\, n. [L., a revealer.] One who, or that which, detects; a detecter. --Shak. [1913 Webster]
  • A deathbed's detector of the heart. --Young. [1913 Webster]
  • 2. Specifically: (a) An indicator showing the depth of the water in a boiler. (b) (Elec.) A galvanometer, usually portable, for indicating the direction of a current. (c) (Elec.) Any of various devices for detecting the presence of electric waves. [Webster 1913 Suppl.]
  • Bank-note detector, a publication containing a description of genuine and counterfeit bank notes, designed to enable persons to discriminate between them.
  • Detector lock. See under Lock. [1913 Webster]

Synonyms of 'detector'

From: Moby Thesaurus