1. (v. t.) To affect with blight; to blast; to prevent the growth and fertility of.

2. (v. t.) Hence: To destroy the happiness of; to ruin; to mar essentially; to frustrate; as, to blight one's prospects.

3. (v. i.) To be affected by blight; to blast; as, this vine never blights.

4. (n.) 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.

5. (n.) 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.

6. (n.) That which frustrates one's plans or withers one's hopes; that which impairs or destroys.

7. (n.) 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.

8. (n.) A rashlike eruption on the human skin.

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