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.
Origin of lie detector
An Americanism dating back to 1905–10
Words nearby lie detector
lidice,
lidless,
lido,
lidocaine,
lie,
lie detector,
lie down,
lie group,
lie in,
lie in state,
lie in wait
Example sentences 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, etc
See polygraph (def. 1), galvanic skin response
Medical definitions for lie detector
lie detector
n.
A polygraph used to detect possible deception during an interrogation.