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rust

[ruhst]

Origin

noun

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.

EXPAND

reddish yellow, reddish brown, or yellowish red.

COLLAPSE

verb (used without object)

to become or grow rusty, as iron.

to contract rust.

to deteriorate or become impaired, as through inaction or disuse.

10.

to become rust-colored.

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Rust is one of our favorite verbs.

So is lollygag. Does it mean:

to spend time idly; loaf.

to expurgate (a written work) by removing or modifying passages considered vulgar or objectionable.

LEARN MORE FUN, UNUSUAL VERBS WITH WORD DYNAMO...

verb (used with object)

11.

to affect with rust.

12.

to impair as if with rust.

13.

to make rust-colored.

adjective

14.

having the color rust.

Verb phrases

15.

rust out, (of metal pipes, machinery, etc.) to decay and become unusable through the action of rust.

16.

rust through, to develop holes, breaks, or the like, because of rust.

17.

rust together, to join two metal pieces, as iron pipes, by causing the joint to rust.

Origin:
before 900; (noun) Middle English; Old English rūst; cognate with German Rost; (v.) Middle English rusten, derivative of the noun; akin to red

Related forms

de·rust, verb (used with object)

un·rust, verb (used with object)

Synonyms
2. corrosion. 9. decay, decline.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To rust

Collins

World English Dictionary

rust (rʌst)

—n
1.	a reddish-brown oxide coating formed on iron or steel by the action of oxygen and moisture
2.	plant pathol Also called: rust fungus
	a. any basidiomycetous fungus of the order Uredinales, parasitic on cereal plants, conifers, etc
	b. any of various plant diseases characterized by reddish-brown discoloration of the leaves and stem, esp that caused by the rust fungi
3.	a. a strong brown colour, sometimes with a reddish or yellowish tinge
	b. (as adjective): a rust carpet
4.	any corrosive or debilitating influence, esp lack of use

—vb
5.	to become or cause to become coated with a layer of rust
6.	to deteriorate or cause to deteriorate through some debilitating influence or lack of use: he allowed his talent to rust over the years

[Old English rūst; related to Old Saxon, Old High German rost]

'rustless

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

rust

O.E. rust, related to rudu "redness," from P.Gmc. *rusta- (cf. Fris. rust, O.H.G., Ger. rost, M.Du. ro(e)st), from PIE *reudh-s-to- (cf. Lith. rustas "brownish," rudeti "to rust;" L. robigo, O.C.S. ruzda "rust"), from base *reudh- "red." The verb is attested from early 13c. As a plant disease, attested

EXPAND

from mid-14c. Rust Belt "dacayed urban industrial areas of mid-central U.S." (1984) was popularized, if not coined, by Walter Mondale's presidential campaign.

COLLAPSE

American Heritage

Medical Dictionary

rust (rŭst)
n.
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.

American Heritage

Science Dictionary

rust (rŭst) Pronunciation Key
Noun

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.
1. 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.
2. Any of the various plant diseases caused by these fungi.

Verb To become corroded or oxidized.

American Heritage

Abbreviations & Acronyms

RUST
Remote User Scheduling Terminal

Encyclopedia Britannica

Encyclopedia

rust

disease of thousands of economically important plants, as well as weeds, caused by more than 4,000 species of fungi.

Learn more about rust with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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