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English definition of “polygraph”

polygraph

noun [C]     /ˈpɒl.ɪ.ɡrɑːf/ US  /ˈpɑː.lɪ.ɡræf/
a piece of electronic equipment used to try to discover if someone is telling liesRelating to detection and solving crimesLies, lying and hypocrisyDishonest people → Synonym lie detector
(Definition of polygraph noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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