- (n.) An instrument for detecting deceptive statements by a subject, by measuring several physiological states of the subject, such as pulse, heartbeat, and sweating. The instrument records these parameters on a strip of paper while the subject is asked questions designed to elicit emotional responses when the subject tries to deceive the interrogator. Also called lie detector.
- (n.) An instrument for multiplying copies of a writing; a manifold writer; a copying machine.
- (n.) In bibliography, a collection of different works, either by one or several authors.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). polygraph. Retrieved September 22, 2026, from http://smartdefine.org/polygraph/definitions/2047204 |
| Chicago | Webster's. 2011. "polygraph" http://smartdefine.org/polygraph/definitions/2047204 (accessed September 22, 2026). |
| Harvard | Webster's 2011, polygraph, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/polygraph/definitions/2047204>. |
| MLA | Webster's. "polygraph" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/polygraph/definitions/2047204> |