Test Your Vocabulary

Take Our 10-Question Quiz

Name That Thing

Take our visual vocab quiz

Test Your Knowledge »

True or False?

A quick quiz about stuff worth knowing

Take It Now »

Join Us on FB & Twitter

Get the Word of the Day and More

Facebook | Twitter
  1. Word Games
  2. Word of the Day
  3. New Words & Slang
  4. Video
 

lie detector


lie detector

noun

Definition of LIE DETECTOR

: a polygraph for detecting physiological evidence (as change in heart rate) of the tension that accompanies lying
See lie detector defined for English-language learners »
See lie detector defined for kids »

Examples of LIE DETECTOR

  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

Related to LIE DETECTOR

Synonyms: polygraph

Rhymes with LIE DETECTOR

smoke detector, stage director, vivisector

Learn More About LIE DETECTOR

Browse

Next Word in the Dictionary: lie down
Previous Word in the Dictionary: lied
All Words Near: lie detector

Seen & Heard

What made you want to look up lie detector? Please tell us where you read or heard it (including the quote, if possible).