1. a person who operates a polygraph machine to conduct lie detector tests
2. a person who writes extensively on many subjects
Usage: literary; rare

Examples

• The polygrapher attached sensors to the suspect’s chest and fingers.
• A certified polygrapher administered the lie detector test during the investigation.
• The company hired a polygrapher to screen potential employees.
• The polygrapher carefully monitored the subject’s physiological responses.
• Police departments often employ a trained polygrapher for criminal cases.
• The polygrapher explained the testing procedure before beginning the examination.