polygraph

[ˈpɒlɪɡrɑːf]

polygraph Definition

a machine that measures and records changes in breathing, blood pressure, and other body functions, used especially as a lie detector.

Using polygraph: Examples

Take a moment to familiarize yourself with how "polygraph" can be used in various situations through the following examples!

• Example

  The suspect was asked to take a polygraph test to determine his involvement in the crime.

• Example

  Polygraphs are not admissible as evidence in court in many jurisdictions.

• Example

  The accuracy of polygraph tests has been widely debated among experts.

polygraph Synonyms and Antonyms

Synonyms for polygraph

• lie detector
• truth detector

Phrases with polygraph

• beat the polygraph

  to deceive or manipulate the results of a polygraph test

  Example

  He thought he could beat the polygraph by controlling his breathing and heart rate.

• polygraph examiner

  a person who administers and interprets the results of a polygraph test

  Example

  The polygraph examiner concluded that the suspect was lying based on the test results.

• polygraph testing

  the process of administering and interpreting the results of a polygraph test

  Example

  Polygraph testing is often used in criminal investigations to determine the truthfulness of suspects.

Origins of polygraph

from Greek 'polus' meaning 'many' and 'graphein' meaning 'to write'

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Summary: polygraph in Brief

A 'polygraph' [ˈpɒlɪɡrɑːf] is a machine that measures and records changes in breathing, blood pressure, and other body functions, used especially as a lie detector. It is often used in criminal investigations to determine the truthfulness of suspects. The accuracy of polygraph tests has been widely debated among experts.