n. The fruit of the rutaceous tree Citrus Medica, var. Limonum.n. The tree that yields this fruit.n. The borhame or sand-sole, a kind of flatfish. See lemon-sole, 1.n. Having lemon as a principal ingredient; impregnated or flavored with lemon: as, lemon candy.n. Of the color of a lemon; lemon-colored: as, lemon silk.