How to Pronounce "polygraph"
word
Definition
A polygraph is a machine that measures and records physical responses, like heart rate and sweating, used to try to tell if someone is telling the truth.
Listen in Context
Many people call a polygraph a lie detector, but it isn't always reliable.
The police used a polygraph during the investigation.
He agreed to take a polygraph test.
A polygraph measures changes in your body.