any of a genus (Symphytum) of European plants of the borage family, with rough, hairy leaves and small blue, purplish, or yellow flowers, sometimes used for forage or ornament
See comfrey in American Heritage Dictionary 4
(kŭmˈfrē)
nounpl.com·freys
Any of various hairy perennial Eurasian herbs of the genus Symphytum, especially S. officinale, having variously colored flowers in coiled cymes and long used in herbal medicine. Also called healing herb.