1. the quality or state of being reactive; tendency to respond quickly or strongly to stimuli or situations

Examples

• The patient’s reactiveness to the medication was monitored closely.
• Her emotional reactiveness made it difficult to have calm discussions.
• The chemical’s reactiveness with oxygen requires careful storage.
• The team’s reactiveness to market changes helped them stay competitive.
• His reactiveness to criticism often led to defensive behavior.
• The sensor’s reactiveness to temperature variations was impressive.