(a) Rust on iron or other metals; also fig.; ~ corrupt, polluted by rust; ~ freten, corroded by rust; (b) rust used as a medicament; (c) in proverbs, comparisons, etc.; (d) fig. moral or spiritual corrosion; ~ of coveitise (misbileve, sinne, etc.); (e) fungus growth on plants, rust, mildew; blight of any kind; a morbid condition of plants caused by searing wind [quot.: WBible(1) Gloss.Joel]; (f) redness of the eye; -- used fig.; (g) in surnames and place name [see Smith PNElem.2.89].