Looking for the meaning or definition of the word polygraph? Here's what it means.
Noun
A device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being asked to a subject, in an attempt to detect lies.
(dated) A mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.
(archaic) A collection of different works, either by one or several authors.
(linguistics) A group of letters that represent a single phoneme
