Definition of groundnut

• n. - The fruit of the Arachis hypogaea (native country uncertain); the peanut; the earthnut.
• n. - A leguminous, twining plant (Apios tuberosa), producing clusters of dark purple flowers and having a root tuberous and pleasant to the taste.
• n. - The dwarf ginseng (Aralia trifolia).
• n. - A European plant of the genus Bunium (B. flexuosum), having an edible root of a globular shape and sweet, aromatic taste; -- called also earthnut, earth chestnut, hawknut, and pignut.