Pronunciation: (pol'i-graf", -gräf"), [key]
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.
to test (a person) with a polygraph.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.