1. The mutual relation, physiologic or pathologic, between two organs, systems, or parts of the body.
2. Mental contagion, as seen in mass hysteria or in the yawning induced by seeing another person yawn.
3. An expressed sensitive appreciation or emotional concern for and sharing of the mental and emotional state of another person.
The information shown above for sympathy is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.