- an early device for reproducing writings or drawings
- an instrument for recording simultaneously changes in blood pressure, respiration, pulse rate, etc., specif. lie detector
Origin of polygraphClassical Greek polygraphos, writing much: see poly- and amp; -graph
transitive verbpol·y·graphed, pol·y·graph·ing, pol·y·graphs
- po·lyg′ra·pher , po·lyg′ra·phist
- 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) An mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.
- (archaic) A collection of different works, either by one or several authors.
(third-person singular simple present polygraphs, present participle polygraphing, simple past and past participle polygraphed)
- To administer a polygraph test.
- The FBI polygraphed the suspect but learned nothing because they already knew he was lying.
poly- "much" + -graph "writing"