Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “lie detector”

lie detector

noun [C]    
a piece of equipment used to try to discover if someone is telling lies: Both men refused to take a lie detector test.Lies, lying and hypocrisyDishonest peopleRelating to detection and solving crimes → Synonym polygraph
(Definition of lie detector noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of lie detector

Definitions of “lie detector” in other dictionaries

Translations of “lie detector”

Word of the Day

limber up

to do gentle exercises to stretch the muscles in order to prepare the body for more active physical exercise

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More