Rust

rust, n. the reddish-brown coating on iron exposed to moisture: anything resembling rust: a disease of cereals and gra es, with brown spots on the leaves, caused by fungi: a corrosive: an injurious habit: any foul matter.— v.i. to become rusty: to become dull by inaction.— v.t. to make rusty: to impair by time and inactivity.— adjs. Rust′-col′oured ; Rust′ful .— adv. Rust′ily .— ns. Rust′ine ; Rust′-mite , certain mites of the family of gall-mites.— adjs. Rust′-proof , not liable to rust; Rust′y , covered with rust: impaired by inactivity, out of practice: dull: affected with rust-disease: time-worn: of a rusty black: rough: obstinate: discoloured.— ns. Rust′y-back , a fern; Rust′y-black′bird , the grackle; Black′-rust , a fungus with dark-coloured spores.— Ride , or Turn , rusty , to become obstinate or stubborn in opposition. [A.S. rust ; Ger. rost .]