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

  • 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.

  • 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.

  • 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.

How do native speakers use this expression?