Pronunciation: (di-tek'shun),[key] —n. 1. the act of detecting.
2. the fact of being detected.
3. discovery, as of error or crime: chance detection of smuggling. 4. Telecommunications. a. rectification of alternating signal currents in a radio receiver.
b. Also calleddemodulation. the conversion of an alternating, modulated carrier wave or current into a direct, pulsating current equivalent to the transmitted information-bearing signal.