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

Examples

• The polygraphist carefully attached the sensors to the suspect’s fingers.
• After years of training, she became a certified polygraphist for the police department.
• The polygraphist reviewed the test results before submitting his report.
• Law enforcement agencies rely on skilled polygraphists to conduct accurate examinations.
• The renowned polygraphist had written books on history, science, and philosophy.
• As a polygraphist, he contributed articles to numerous academic journals.