Lie detector

Pronunciation: /ˈɫaɪ dɪˈtɛktɝ/

Lie detector (noun)

  1. A machine used to check whether someone is telling the truth by measuring changes in their body during questions.
  2. A procedure that tries to judge honesty using signals such as breathing, heart rate, or skin response.

Examples

  • The lie detector measures changes in your body during questioning.
  • A lie detector can help investigators check whether someone is telling the truth.