(1):

(n.) A specific internal application for the cure or relief of sickness; a remedy for disease; a medicine.

(2):

(n.) The art of healing diseases; the science of medicine; the theory or practice of medicine.

(3):

(n.) Specifically, a medicine that purges; a cathartic.

(4):

(n.) A physician.

(5):

(v. t.) To treat with physic or medicine; to administer medicine to, esp. a cathartic; to operate on as a cathartic; to purge.

(6):

(v. t.) To work on as a remedy; to heal; to cure.