lie detector

Definition of "lie detector"
  1. A device used to identify physiological signs of stress typically associated with dishonesty
How to use "lie detector" in a sentence
  1. The police used a lie detector to investigate the credibility of the suspect's statements.
  2. He agreed to take a lie detector test to prove his innocence.
  3. The lie detector results showed significant changes in her heart rate when answering certain questions.

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