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


lie detector

BrE BrE//ˈlaɪ dɪtektə(r)//
; NAmE NAmE//ˈlaɪ dɪtektər//
(specialist, formal polygraph) Solving crime
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a piece of equipment that is used, for example by the police, to find out if somebody is telling the truth See related entries: Solving crime
See the Oxford Advanced American Dictionary entry: lie detector