lie detector

noun

Definition of lie detectornext
as in polygraph
an instrument for detecting physical signs of the tension that goes with lying hooked the suspect up to a lie detector before interrogating him about the robbery

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of lie detector Those who tried Silk vs. milk could then take a lie detector done by polygraph specialist John Grogan. — Victoria Uwumarogie, Essence, 16 Jan. 2025 According to one lawyer, his client proved his innocence with a lie detector test. — Michael Gfoeller and David H. Rundell, Newsweek, 16 Jan. 2025 That illusion is enough to fool even a lie detector. — Dmitry Mishunin, Forbes, 10 Dec. 2024 The lie detector consists of the blind monk from the crucifix room at the Vatican and a cup of seltzer water. — Maggie Fremont, Vulture, 15 Aug. 2024 See All Example Sentences for lie detector

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“Lie detector.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lie%20detector. Accessed 22 Mar. 2025.

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More from Merriam-Webster on lie detector

Britannica.com: Encyclopedia article about lie detector

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