Meaning Of The Word Lie detector

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Lie detector Meaning

Lie detector Definition
Lie detector Definition

What's The Definition Of Lie detector?

lie detector
A lie detector is an electronic machine used mainly by the police to find out whether a suspect is telling the truth.

lie detector in American English
a polygraph used on persons suspected of lying: it records certain bodily changes assumed to occur when the subject lies in answering questions
noun: a polygraph used to determine changes in certain body activities, as blood pressure, pulse, breathing, and perspiration, the results of which may be interpreted to indicate the truth or falsity of a person's answers under questioning

lie detector in British English
noun: a polygraph used esp by a police interrogator to detect false or devious answers to questions, a sudden change in one or more involuntary physiological responses being considered a manifestation of guilt, fear, etc

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