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Showing results for polygraph.
Definitions

polygraph

[pol-i-graf, -grahf] / ˈpɒl ɪˌgræf, -ˌgrɑf /
NOUN
lie detector
Synonyms
WEAK
polygraph machine psychogalvanic skin response psychogalvanometer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The person in question had no alibi for the night of the murder and had failed two polygraph tests, according to police records.

From Slate • Apr. 6, 2026

The DEA is supporting the Bolivian government as it conducts "reliability" screens on anti-narcotics officers using polygraph lie detectors.

From Barron's • Apr. 1, 2026

Perez requested a polygraph test and failed it, Flores testified.

From Los Angeles Times • Feb. 19, 2026

Noem and Lewandowski frequently berate senior-level staff within DHS and give polygraph tests to employees they don’t trust.

From The Wall Street Journal • Feb. 13, 2026

Lie-detection tests are notoriously inaccurate, and calculations similar to the above demonstrate why truthful people who flunk polygraph tests usually outnumber liars.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos

Vocabulary lists containing polygraph

Psychology

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