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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.
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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.
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A state of cloudy, humid weather.
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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.
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Something that impedes development or growth, or spoils any other aspect of life.
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A rundown and unsightly condition of an urban area; also, such an area.