Simple Definition of polygraph
: a test that is done with a lie detector to see if someone is telling the truth
Examples of polygraph in a sentence
They hooked him up to the polygraph and began the test.
She was asked to take a polygraph.
First Known Use of polygraph
Rhymes with polygraph
allograph, autograph, barograph, bathyscaphe, cenotaph, chronograph, circle graph, cryptograph, epigraph, epitaph, half-and-half, hectograph, holograph, homograph, hygrograph, kymograph, lithograph, logograph, micrograph, monograph, pantograph, paragraph, phonograph, photograph, pictograph, quarterstaff, seismograph, serigraph, shadowgraph, shandygaff, spectrograph, sphygmograph, telegraph, thermograph, typograph
Medical Definition of polygraph
: an instrument for simultaneously recording variations of several different pulsations (as of the pulse, blood pressure, and respiration)—see lie detector
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