| any plant disease, esp. of apples, peaches, plums, and cherries, characterized by browning and decay of tissues, caused by various fungi and bacteria. |

| brown rot n. Any of several plant diseases, especially a disease of peach, plum, apricot, cherry, and related plants, characterized by wilting and browning of the flowers and leaves and rotting of the fruits. |
| brown rot
Any of several plant diseases, especially a disease of peach, plum, cherry, and related plants, caused by an ascomycete fungus and characterized by wilting and browning of the flowers and leaves and rotting of the fruits. |