Dictionary  pol•y•graphPronunciation: (pol'i-graf", -gräf"), [key] —n. 1. an instrument for receiving and recording simultaneously tracings of variations in certain body activities. 2. a test using such an instrument to determine if a person is telling the truth. 3. See lie detector. 4. an apparatus for producing copies of a drawing or writing. 5. a prolific or versatile author. —v.t. to test (a person) with a polygraph. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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