Fox-grape definition

A wild grape (Vitis labrusca) of the eastern United States that bears purplish-black berries and is the source of many cultivated grape varieties.

A common wild grape (Vitis labrusca) native to E North America with leaves whose undersides are covered with whitish or reddish woolly hairs: it is the parent of many American vineyard grapes, as the Concord and Catawba.