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
In December 2012, Sheila and Rachel agreed to take a lie detector test, even though investigators knew results were not admissible in court.
—
Alex Gurley, People.com, 6 July 2025
After learning about Charlie’s human lie detector power, Alex decides to prod Brick about Rodney’s death in front of her, and Charlie can’t entirely ignore how much Brick is lying either.
—Louis Peitzman, Vulture, 26 June 2025
His security locked her in an office and administered a lie detector test.
—Tracy Wright, FOXNews.com, 28 May 2025
In asking for the Rule 29 motion, defense attorney Alexandra Shapiro argued there’s insufficient evidence of kidnapping and racketeering in regards to Capricorn Clark’s claim she was forced to take a lie detector test for days at a building in Manhattan after some of Combs’ jewelry went missing.
—Nbc News, NBC news, 24 June 2025
See All Example Sentences for lie detector
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Alex Gurley, People.com, 6 July 2025
After learning about Charlie’s human lie detector power, Alex decides to prod Brick about Rodney’s death in front of her, and Charlie can’t entirely ignore how much Brick is lying either.
—Louis Peitzman, Vulture, 26 June 2025
His security locked her in an office and administered a lie detector test.
—Tracy Wright, FOXNews.com, 28 May 2025
In asking for the Rule 29 motion, defense attorney Alexandra Shapiro argued there’s insufficient evidence of kidnapping and racketeering in regards to Capricorn Clark’s claim she was forced to take a lie detector test for days at a building in Manhattan after some of Combs’ jewelry went missing.
—Nbc News, NBC news, 24 June 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 18 Jul. 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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