lie detector
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.
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Nearby words
lidice, lidless, lido, lidocaine, lie, lie detector, lie down, lie group, lie in, lie in state, lie in wait
Origin of lie detector
An Americanism dating back to 1905–10
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for lie detector
British Dictionary definitions for lie detector
lie detector
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, etcSee polygraph (def. 1), galvanic skin response
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for lie detector
lie detector
n.
A polygraph used to detect possible deception during an interrogation.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.