- an instrument for receiving and recording simultaneously tracings of variations in certain body activities.
- a test using such an instrument to determine if a person is telling the truth.
- lie detector.
- an apparatus for producing copies of a drawing or writing.
- a prolific or versatile author.
- to test (a person) with a polygraph.
Origin of polygraph
Examples from the Web for polygraph
The polygraph, which uses a range of measurements including blood pressure, was patented by Leonarde Keeler in 1931.Wonder Woman’s Creation Story Is Wilder Than You Could Ever Imagine
November 3, 2014
By way of proving his innocence, DeMaio took a polygraph test—and passed.No Shaking Sexual Harassment Allegations for Gay GOP House Hopeful
October 12, 2014
Yesterday, The Daily Beast revealed that Egan had, according to his lawyer Jeff Herman, passed a polygraph test.Third Hollywood Power Player Files Motion to Dismiss Sex Abuse Lawsuit
May 22, 2014
DeMaio responded to the “vicious rumor” by taking a polygraph test, which he passed.Gay Republican Runs Against The LGBT Lobby
May 3, 2014
Forced to take a polygraph test, Saul is asked a question to establish a baseline reading: “Are you sometimes called ‘The Bear’?”Give Mandy Patinkin an Emmy Nomination for ‘Homeland,’ Already!
July 17, 2013
Pentathol, scopolamine and the like; hypnotism and the polygraph.The Untouchable
Stephen A. Kallis
We don't need a scholar, nor a polygraph, but rather a writer who'll be one of us.Philosophic Nights In Paris
Remy De Gourmont
When you took the polygraph, you were present during the polygraph examination of Frazier, were you?
Did he suggest that he had been asked before to take a polygraph?
He made some comment along the line that it had never been his policy—before, to take a polygraph.
- an instrument for the simultaneous electrical or mechanical recording of several involuntary physiological activities, including blood pressure, skin resistivity, pulse rate, respiration, and sweating, used esp as a would-be lie detector
- a device for producing copies of written, printed, or drawn matter
Word Origin and History for polygraph
1794, "mechanical device for making multiple copies of something written or drawn," from Greek polygraphos "writing much," from polys "much" (see poly-) + graphos "writing," from graphein "to write" (see -graphy).
Meaning "instrument for recording several pulsations of the body at the same time" is 1871; first used as a lie detector 1921. Related: Polygraphy (1590s); polygraphic (1771).
- An instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure, and respiration.