1. (a.) Compassionate; affectionate; feeling for the pain of others.

2. (a.) Produced by, or expressive of, sympathy.

3. (a.) Produced by sympathy; -- applied particularly to symptoms or affections. See Sympathy.

4. (a.) of or relating to the sympathetic nervous system or some of its branches; produced by stimulation on the sympathetic nervous system or some part of it; as, the sympathetic saliva, a modified form of saliva, produced from some of the salivary glands by stimulation of a sympathetic nerve fiber.