blight (bl t)n. 1. a. Any of numerous plant diseases resulting in sudden conspicuous wilting and dying of affected parts, especially young, growing tissues. b. The condition or causative agent, such as a bacterium, fungus, or virus, that results in blight. 2. An extremely adverse environmental condition, such as air pollution. 3. Something that impairs growth, withers hopes and ambitions, or impedes progress and prosperity. v. blight·ed, blight·ing, blights v.tr. 1. To cause (a plant, for example) to undergo blight. 2. To have a deleterious effect on; ruin. See Synonyms at blast. v.intr. To suffer blight. [Origin unknown.] |
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