noun

1. any atmospheric or soil condition, parasite, or insect that kills, withers, or checks the growth of plants
2. any of several plant diseases, as rust, mildew, or smut
3. anything that destroys, prevents growth, or causes devaluation slums are a blight on a city
4. a person or thing that withers someone's hopes or ambitions
5. the condition or result of being blighted

Etymology: ? akin to ME blichening, blight, rust (on grain) < bliknen, to lose color < ON blikja, turn pale: see bleach

transitive verb

1. to cause a blight in or on; wither
2. to destroy
3. to disappoint or frustrate

intransitive verb