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  1. Dictionary
    rust
    /rʌst/

    noun

    • 1. a reddish- or yellowish-brown flaking coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture: "paint protects your car from rust"
    • 2. a fungal disease of plants which results in reddish or brownish patches.

    verb

    • 1. be affected with rust: "the blades had rusted away"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishRUST | English meaning - Cambridge Dictionary

    RUST definition: 1. a reddish-brown substance that forms on the surface of iron and steel as a result of reacting…. Learn more.

  3. www.merriam-webster.com › dictionary › rustRust Definition & Meaning - Merriam-Webster

    The meaning of RUST is the reddish brittle coating formed on iron especially when chemically attacked by moist air and composed essentially of hydrated ferric oxide. How to use rust in a sentence.

  4. en.wikipedia.org › wiki › RustRust - Wikipedia

    Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron(III) oxides (Fe 2 O 3 ·nH 2 O) and iron(III) oxide-hydroxide (FeO(OH), Fe(OH) 3), and is typically associated with the corrosion of refined iron.

  5. www.dictionary.com › browse › rustRUST Definition & Meaning | Dictionary.com

    Rust definition: 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.. See examples of RUST used in a sentence.

  6. www.collinsdictionary.com › dictionary › englishRUST definition and meaning | Collins English Dictionary

    Rust is a brown substance that forms on iron or steel when it comes into contact with water.

  7. www.vocabulary.com › dictionary › rustRust - Definition, Meaning & Synonyms | Vocabulary.com

    a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture. see more. noun. the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water. synonyms: rusting. see more. verb. become destroyed by water, air, or a corrosive such as an acid. “The pipes rusted ”

  8. www.thefreedictionary.com › rustRust - definition of rust by The Free Dictionary

    rust. (rŭst) n. 1. a. Any of various powdery or scaly reddish-brown or reddish-yellow hydrated ferric oxides and hydroxides formed on iron and iron-containing materials by low-temperature oxidation in the presence of water. b. Any of various metallic coatings, especially oxides, formed by corrosion. c. A stain or coating resembling iron rust. 2.

  9. dictionary.cambridge.org › dictionary › learner-englishRUST | meaning - Cambridge Learner's Dictionary

    RUST definition: a dark orange substance that you get on metal when it has been damaged by air and water. Learn more.

  10. www.dictionary.com › browse › rustRUST Definition & Usage Examples | Dictionary.com

    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.

  11. www.ldoceonline.com › dictionary › rustrust | meaning of rust in Longman Dictionary of Contemporary...

    rust meaning, definition, what is rust: the reddish-brown substance that forms o...: Learn more.