noun
Definition: A device that measures and records physiological responses like heart rate, blood pressure, and breathing, often used to determine if someone is lying.
Example: The detective used a polygraph to check if the suspect was telling the truth.
transitive verb
Definition: A device that measures and records physiological responses, such as heart rate and blood pressure, to determine if someone is telling the truth or lying.
Example: The detective decided to polygraph the suspect to see if he was being honest about his alibi.