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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Recent Examples of lie detector
Well before the lie detector tests, Brown, 6ix9ine and Ross were outside the home playing pickup football when fans drove past.
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Ryan Morik, FOXNews.com, 20 Nov. 2025
Either way, no one seems to understand what Demi’s endgame is in all of this, especially now that lie detector tests seem to be standard operating procedure on this television program.
—Olivia Crandall, Vulture, 14 Nov. 2025
What was Jordan’s reaction to the lie detector test coming back as inconclusive?
—Jason Pham, StyleCaster, 13 Nov. 2025
On Tuesday, the Grammy winner returned for round two of Vanity Fair’s lie detector test interview, a year after the series exposed her for doubting the 1969 moon landing.
—Shania Russell, Entertainment Weekly, 13 Nov. 2025
See All Example Sentences for lie detector
Recent Examples of Synonyms for lie detector
polygraph
Noun
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The report highlighted a degree of mistrust on both sides, with Chinese agents said to be recruiting Russian nationals with Chinese spouses and conducting polygraph tests on returning agents returning from the Eurasian country.—
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The polygraph results were not admissible in court, so Perkins was not arrested at the time.—
Cite this Entry
“Lie detector.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lie%20detector. Accessed 20 Jan. 2026.
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