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Definition of Lie detection
1. Noun. (informal) The use of polygraphs during interrogation in an attempt to verify the truth or falsity of a subject's responses ¹
2. Noun. (context: broadly) The use of any technique intended to detect deception. ¹
¹ Source: wiktionary.com
Medical Definition of Lie detection
1. Ascertaining of deception through detection of emotional disturbance as manifested by changes in physiologic processes usually using a polygraph. (12 Dec 1998)