- Also called iron rust. the red or orange coating that forms on the surface of iron when exposed to air and moisture, consisting chiefly of ferric hydroxide and ferric oxide formed by oxidation.
- any film or coating on metal caused by oxidation.
- a stain resembling this coating.
- any growth, habit, influence, or agency tending to injure, deteriorate, or impair the mind, character, abilities, usefulness, etc.
- Plant Pathology.
- any of several diseases of plants, characterized by reddish, brownish, or black pustules on the leaves, stems, etc., caused by fungi of the order Uredinales.
- Also called rust fungus.a fungus causing this disease.
- any of several other diseases of unknown cause, characterized by reddish-brown spots or discolorations on the affected parts.
- reddish yellow, reddish brown, or yellowish red.
- to become or grow rusty, as iron.
- to contract rust.
- to deteriorate or become impaired, as through inaction or disuse.
- to become rust-colored.
- to affect with rust.
- to impair as if with rust.
- to make rust-colored.
- having the color rust.
- rust out, (of metal pipes, machinery, etc.) to decay and become unusable through the action of rust.
- rust through, to develop holes, breaks, or the like, because of rust.
- rust together, to join two metal pieces, as iron pipes, by causing the joint to rust.
Origin of rust
SynonymsSee more synonyms for rust on Thesaurus.com
Examples from the Web for rusting
Oxygen is an extremely reactive chemical, corroding metals, rusting iron, and fueling fires.Why Did It Take So Long For Complex Life To Evolve On Earth? Blame Oxygen.
Matthew R. Francis
November 2, 2014
Quality can be found in the most mundane works of man—even within the rusting gears of a motorcycle engine.Zen, Motorcycles, And The Cult of Tech: How Robert Pirsig’s Classic Anticipated the Future
August 31, 2014
The crude, rusting poles are piled side-by-side in a snowdrift of steel on the floor of the Hirshhorn.Chinese Hold Ai WeiWei’s Passport, Denies Access to Art Opening
October 8, 2012
Ultimately, he's attempting to set a new course for an overweight and rusting battleship.Mayor Rahm Emanuel Reaches Flawed Deal to End Chicago Teachers Strike
September 19, 2012
Saying the Syrian military is “rusting,” Hijab claimed Assad now controls just 30 percent of the country's land.Former Syrian Prime Minister Riyad Hijab Calls Regime an ‘Enemy of God’
August 14, 2012
He has thrown away the axe, which is now rusting under the floor.Aino Folk-Tales
Basil Hall Chamberlain
You aren't written out, as you call it, but you are rusting out, fast.Kent Knowles: Quahaug
Joseph C. Lincoln
He dropped immediately to his knees behind the rusting bulk of an Olds 88.Small World
William F. Nolan
They are not happy because they have quit their life's habit of work, and are rusting out.Dollars and Sense
Col. Wm. C. Hunter
It was summer and the steel soles were greased to keep them from rusting.Watch Yourself Go By
Al. G. Field
- a reddish-brown oxide coating formed on iron or steel by the action of oxygen and moisture
- Also called: rust fungus plant pathol
- any basidiomycetous fungus of the order Uredinales, parasitic on cereal plants, conifers, etc
- any of various plant diseases characterized by reddish-brown discoloration of the leaves and stem, esp that caused by the rust fungi
- a strong brown colour, sometimes with a reddish or yellowish tinge
- (as adjective)a rust carpet
- any corrosive or debilitating influence, esp lack of use
- to become or cause to become coated with a layer of rust
- to deteriorate or cause to deteriorate through some debilitating influence or lack of usehe allowed his talent to rust over the years
Word Origin and History for rusting
"red oxide of iron," Old English rust "rust; moral canker," related to rudu "redness," from Proto-Germanic *rusta- (cf. Frisian rust, Old High German and German rost, Middle Dutch ro(e)st), from PIE *reudh-s-to- (cf. Lithuanian rustas "brownish," rudeti "to rust;" Latin robigo, Old Church Slavonic ruzda "rust"), from root *reudh- "red" (see red (adj.1)).
As a plant disease, attested from mid-14c. Rust Belt "decayed urban industrial areas of mid-central U.S." (1984) was popularized, if not coined, by Walter Mondale's presidential campaign.
early 13c., from rust (n.). Transitive sense "cause to rust" is from 1590s. Related: Rusted; rusting.
- Any of a group of parasitic fungi of the order Uredinales that are plant pathogens, especially of cereal grains, and that can produce allergy in humans when inhaled in large numbers.
- Any of the various reddish-brown oxides of iron that form on iron and many of its alloys when they are exposed to oxygen in the presence of moisture.
- Any of various basidiomycete fungi that are parasitic on plants and produce reddish or brownish spots on leaves. Rusts attack a wide variety of plants and can cause enormous damage to crops.
- Any of the various plant diseases caused by these fungi.
- To become corroded or oxidized.