lie detector

noun

Definition of lie detector

:a polygraph for detecting physiological evidence (such as change in heart rate) of the tension that accompanies lying

Examples of lie detector in a Sentence

  1. The murder suspect failed a lie detector test.

  2. hooked the suspect up to a lie detector before interrogating him about the robbery

First Known Use of lie detector

1909

lie detector Synonyms

Synonyms
polygraph

LIE DETECTOR Defined for English Language Learners

lie detector

noun

Definition of lie detector for English Language Learners

  • : a device used to measure the heart rate, breathing, etc., in order to find out if someone (such as a person suspected of a crime) is being honest


Medical Dictionary

lie detector

play
noun \ ˈlī-di-ˌtek-tər \

medical Definition of lie detector

:a polygraph for detecting physiological evidence (as change in heart rate) of the tension that accompanies lying

Law Dictionary

lie detector

noun lie de·tec·tor

legal Definition of lie detector

:an instrument for detecting physiological evidence of the tension that accompanies lying — compare polygraph


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