to affect with blight; to blast; to prevent the growth and fertility of.-hence: to destroy the happiness of; to ruin; to mar essentially; to frustrate; as, to blight one's prospects.-to be affected by blight; to blast; as, this vine never blights.-mildew; decay; anything nipping or blasting; -- applied as a general name to various injuries or diseases of plants, causing the whole or a part to wither, whether occasioned by insects, fungi, or atmospheric influences.-the act of blighting, or the state of being blighted; a withering or mildewing, or a stoppage of growth in the whole or a part of a plant, etc.-that which frustrates one's plans or withers one's hopes; that which impairs or destroys.-a downy species of aphis, or plant louse, destructive to fruit trees, infesting both the roots and branches; -- also applied to several other injurious insects.-a rashlike eruption on the human skin.