any uncultivated species of Avena, especially a common weedy grass, A. fatua, resembling the cultivated oat.
a hardy plant, Uvularia sessilifolia, of the lily family, of eastern North America, having deep green, hairy leaves and greenish-yellow, tubular flowers.
Idioms
sow one's wild oats, to have a youthful fling at reckless and indiscreet behavior, especially to be promiscuous before marriage.
