Pronunciation: (in-tol'ur-uns),[key] —n. 1. lack of toleration; unwillingness or refusal to tolerate or respect contrary opinions or beliefs, persons of different races or backgrounds, etc.
2. incapacity or indisposition to bear or endure: intolerance to heat. 3. abnormal sensitivity or allergy to a food, drug, etc.
4. an intolerant act.