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Rust   /rəst/   Listen
noun
Rust  n.  
1.
(Chem.) The reddish yellow coating formed on iron when exposed to moist air, consisting of ferric oxide or hydroxide; hence, by extension, any metallic film of corrosion.
2.
(Bot.) A minute mold or fungus forming reddish or rusty spots on the leaves and stems of cereal and other grasses (Trichobasis Rubigo-vera), now usually believed to be a form or condition of the corn mildew (Puccinia graminis). As rust, it has solitary reddish spores; as corn mildew, the spores are double and blackish. Note: Rust is also applied to many other minute fungi which infest vegetation, such as the species of Ustilago, Uredo, and Lecythea.
3.
That which resembles rust in appearance or effects. Specifically:
(a)
A composition used in making a rust joint. See Rust joint, below.
(b)
Foul matter arising from degeneration; as, rust on salted meat.
(c)
Corrosive or injurious accretion or influence. "Sacred truths cleared from all rust and dross of human mixtures." Note: Rust is used in the formation of compounds of obvious meaning; as, rust-colored, rust-consumed, rust-eaten, and the like.
Rust joint, a joint made between surfaces of iron by filling the space between them with a wet mixture of cast-iron borings, sal ammoniac, and sulphur, which by oxidation becomes hard, and impervious to steam, water, etc.
Rust mite (Zool.), a minute mite (Phytopius oleivorus) which, by puncturing the rind, causes the rust-colored patches on oranges.


verb
Rust  v. t.  
1.
To cause to contract rust; to corrode with rust; to affect with rust of any kind. "Keep up your bright swords, for the dew will rust them."
2.
Fig.: To impair by time and inactivity.


Rust  v. i.  (past & past part. rusted; pres. part. rusting)  
1.
To contract rust; to be or become oxidized. "If gold ruste, what shall iron do?" "Our armors now may rust."
2.
To be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants.
3.
Fig.: To degenerate in idleness; to become dull or impaired by inaction. "Must I rust in Egypt? never more Appear in arms, and be the chief of Greece?"





Collaborative International Dictionary of English 0.48


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"Rust" Quotes from Famous Books



... did not like this view of the matter, and disputed energetically with the master. At last he asked him to explain how it was that all this gold and silver was the property of one man and was left to rust, and why the master of the treasure incessantly laboured to increase it when he had already such an amazing superfluity of riches. The master answered, "I am not a man, although I have the form and appearance ...
— The Hero of Esthonia and Other Studies in the Romantic Literature of That Country • William Forsell Kirby
... shining on the iron would make it so hot it would burn any flower you tried to plant in the opening; the water couldn't reach the roots, and all that fell on the slab would run off and make it that much wetter at the edges. The iron would soon rust and grow dreadfully ugly lying under winter snow. There is nothing at all in it, save a method to work on the feelings of the living, and get them to pay their money for something that wouldn't ...
— Laddie • Gene Stratton Porter
... great. I can't find anything wrong, except a little rust. I'll take a look at that transmitting jigger and send ...
— The Pirate Shark • Elliott Whitney
... Francis II., for the simple reason that it was introduced at the wrong moment. Doubtless some of these relics of Eastern warfare possessed as pointed and applicable dicta as that of Capua, and had I had sufficient time I should have scraped off the mould and rust of accumulated ages, and have copied some of the inscriptions. That they could be fired was placed beyond a doubt by the promiscuous medley of explosions which greeted us, and which I purposely abstain from calling a salute, so unlike was it to everything ...
— Herzegovina - Or, Omer Pacha and the Christian Rebels • George Arbuthnot
... without changing his travelling clothes, rang for a cab and was driven rapidly up the Avenue. He was a man of science, not of enthusiasms, cold, unerring, brilliant; a superb intellectual machine, which never showed a fleck of rust, unremittingly polished, and enlarged with every improvement. But for one man he cherished an abiding sympathy; to that man he hastened on the slightest summons, as he hastened now. They had been intimate in boyhood; then in later years through mutual ...
— The Bell in the Fog and Other Stories • Gertrude Atherton


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