rust, rusty, rust-brown

(adjective) of the brown color of rust

rust, rust fungus

(noun) any of various fungi causing rust disease in plants

rust, rusting

(noun) the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water


(noun) a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi


(noun) a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture


(verb) become coated with oxide

corrode, rust

(verb) become destroyed by water, air, or a corrosive such as an acid; “The metal corroded”; “The pipes rusted”

corrode, eat, rust

(verb) cause to deteriorate due to the action of water, air, or an acid; “The acid corroded the metal”; “The steady dripping of water rusted the metal stopper in the sink”

Source: WordNet® 3.1

Etymology 1


rust (countable and uncountable, plural rusts)

The deteriorated state of iron or steel as a result of moisture and oxidation.

A similar substance based on another metal (usually with qualification, such as "copper rust").

A reddish-brown color.

A disease of plants caused by a reddish-brown fungus.

(philately) Damage caused to stamps and album pages by a fungal infection.

Etymology 2


rust (third-person singular simple present rusts, present participle rusting, simple past and past participle rusted)

(intransitive) To oxidize, especially of iron or steel.

(transitive) To cause to oxidize.

(intransitive) To be affected with the parasitic fungus called rust.

(ambitransitive, figuratively) To (cause to) degenerate in idleness; to make or become dull or impaired by inaction.


• oxidise / oxidize

• corrode


• RTUs, UTRs, ruts, stur, turs


Proper noun

Rust (plural Rusts)

A surname.

A multiparadigm programming language focused on safety, especially safe concurrency.


• According to the 2010 United States Census, Rust is the 2967th most common surname in the United States, belonging to 12086 individuals. Rust is most common among White (93.79%) individuals.


• RTUs, UTRs, ruts, stur, turs

Source: Wiktionary

Rust, n. Etym: [AS. rust; akin to D. roest, G. & Sw. rost, Icel. ryth; -- named from its color, and akin to E. red. *113. See Red.]

1. (Chem.)

Definition: 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.)

Definition: 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. Eikon Basilike.

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 (Zoöl.), a minute mite (Phytopius oleivorus) which, by puncturing the rind, causes the rust-colored patches on oranges.

Rust, v. i. [imp. & p. p. Rusted; p. pr. & vb. n. Rusting.] Etym: [AS. rustian.]

1. To contract rust; to be become oxidized. If gold ruste, what shall iron do Chaucer. Our armors now may rust. Dryden.

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 Dryden.

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. Shak.

2. Fig.: To impair by time and inactivity. Johmson.

Source: Webster’s Unabridged Dictionary 1913 Edition


Word of the Day

3 February 2023


(verb) cause to continue in a certain state, position, or activity; e.g., ‘keep clean’; “hold in place”; “She always held herself as a lady”; “The students keep me on my toes”

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Coffee Trivia

In 1511, leaders in Mecca believed coffee stimulated radical thinking and outlawed the drink. In 1524, the leaders overturned that order, and people could drink coffee again.

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