1. not subjected to or affected by something harmful or dangerous
Usage: often used in medical or scientific contexts
2. not revealed or made visible

Examples

• The nonexposed group showed no signs of the disease.
• Nonexposed skin remained healthy after the chemical spill.
• The study compared exposed and nonexposed workers.
• Keep the nonexposed film in a dark container.
• The nonexposed areas of the photograph remained blank.
• Researchers identified several nonexposed control subjects.