blight

A diseased condition suffered by a plant; specifically, a complete and rapid chlorosis, browning, then death of plant tissues such as floral organs, leaves, branches, or twigs, especially one caused by a fungus; a mildew, a rust, a smut.

(figurative) Something that impedes development or growth, or spoils any other aspect of life.

(figurative) A rundown and unsightly condition of an urban area; also, such an area.

(old-fashioned) A diseased condition of the face or skin; specifically, bleeding under the conjunctiva of the eye, a form of skin rash, or a palsy of the face due to cold.

The cause of such a condition, often unseen but believed to be airborne; specifically, a bacterium, a virus, or (especially) a fungus; also, an aphid which attacks fruit trees.

A state of cloudy, humid weather.

To affect the fertility or growth of (a plant) with a blight, especially one caused by a fungus; to blast, to mildew, to smut.

(figurative) To impede the development or growth of (an aspect of life); to damage, to ruin, to spoil.

Of a plant: to suffer blight.

(old-fashioned) To affect (a body part) with a disease.