1. people who operate polygraph machines (lie detectors) or administer polygraph tests
Usage: technical; law enforcement context
2. people who write in multiple languages or produce multilingual texts
Usage: literary; academic context

Examples

• The police department hired three new polygraphists to handle the increased caseload.
• Experienced polygraphists must complete extensive training before conducting examinations.
• The conference brought together polygraphists from around the world to discuss new techniques.
• Medieval polygraphists often wrote manuscripts in Latin, Greek, and vernacular languages.
• Modern polygraphists in academia frequently publish research in multiple languages.
• The polygraphists carefully calibrated their equipment before each test session.