- 1[uncountable, countable] any disease that kills plants, especially crops potato blight Many areas have been devastated by blights which destroyed cereal crops and vines.
- 2[singular, uncountable] blight (on somebody/something) something that has a bad effect on a situation, a person's life, or the environment His death cast a blight on the whole of that year. urban blight (= areas in a city that are ugly or not cared for well) Her divorce was a great blight on her life.
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