noun
1. : a very destructive disease of apples, grapes, and other fruit caused by a fungus ( Glomerella cingulata ) and producing cankers on the twigs, limbs, and fruit spurs and a spotting or blistering and decay of the fruit characterized by bitterness of the pulp — called also anthracnose, ripe rot
2. : a rot of ripening grapes caused by an imperfect fungus ( Melanconium fuligineum )