1. excessively or abnormally responsive to a stimulus; showing an unusually strong reaction
Usage: often used in medical and scientific contexts; can describe physiological or behavioral reactions

Examples

• The patient's hyperresponsive immune system caused severe allergic reactions to common substances.
• Children with asthma often have hyperresponsive airways that constrict easily.
• The hyperresponsive market reacted sharply to the minor economic news.
• His hyperresponsive nervous system made him sensitive to loud noises and bright lights.
• The hyperresponsive skin condition flared up with minimal irritation.
• Hyperresponsive individuals may experience anxiety in situations others find manageable.