lie detector
noun
: a polygraph for detecting physiological evidence (such as change in heart rate) of the tension that accompanies lying
Examples of lie detector in a Sentence
The murder suspect failed a lie detector test.
hooked the suspect up to a lie detector before interrogating him about the robbery
Recent Examples on the Web
Kardashian inspired even more backlash after the internet noticed that the gown appeared to have been damaged during the May 2022 event — though the star denied any harm in a recent lie detector video for Vanity Fair with her All's Fair costar Teyana Taylor.
—
Bailey Richards, PEOPLE, 27 Nov. 2025
The clips currently making the rounds feature 6ix9ine on their streams doing gags like answering questions under a lie detector.
—Jeff Ihaza, Rolling Stone, 25 Nov. 2025
Under scrutiny, Ginella couldn’t keep her stories straight, and after failing a lie detector test with flying colors, stopped filming with the cast entirely about halfway through the season until the recent reunion episodes.
—Kate Aurthur, Variety, 21 Nov. 2025
Well before the lie detector tests, Brown, 6ix9ine and Ross were outside the home playing pickup football when fans drove past.
—Ryan Morik, FOXNews.com, 20 Nov. 2025
See All Example Sentences for lie detector
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Bailey Richards, PEOPLE, 27 Nov. 2025
The clips currently making the rounds feature 6ix9ine on their streams doing gags like answering questions under a lie detector.
—Jeff Ihaza, Rolling Stone, 25 Nov. 2025
Under scrutiny, Ginella couldn’t keep her stories straight, and after failing a lie detector test with flying colors, stopped filming with the cast entirely about halfway through the season until the recent reunion episodes.
—Kate Aurthur, Variety, 21 Nov. 2025
Well before the lie detector tests, Brown, 6ix9ine and Ross were outside the home playing pickup football when fans drove past.
—Ryan Morik, FOXNews.com, 20 Nov. 2025
See All Example Sentences for lie detector
Cite this Entry
“Lie detector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lie%20detector. Accessed 29 Nov. 2025.
Copy CitationMedical Definition
lie detector
noun
: a polygraph for detecting physiological evidence (as change in heart rate) of the tension that accompanies lying
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