lie detector

1. 1.

   a polygraph that records bodily changes sometimes associated with lying

   Broaderpolygraph

   Partsgalvanic skin response

Questions about lie detector

What does lie detector mean?

lie detector means "a polygraph that records bodily changes sometimes associated with lying".

Is lie detector a common word?

lie detector is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.