Definition of rust in English:


Line breaks: rust
Pronunciation: /rʌst


[mass noun]
1A 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 figurative the MPs are here to scrape the rust off the derelict machinery of government
More example sentences
  • A blackened heap of rust and iron, the old stove sat in the corner of the living room.
  • The Juliana bases are constructed of a galvanized steel to resist rust and decay.
  • The presence of rust and corrosion indicates possible moisture invasion and a potential electrical hazard.
2 [usually with adjective or noun modifier] A fungal disease of plants which results in reddish or brownish patches.
More example sentences
  • Many rust diseases are very specialized and have just one or two hosts.
  • Leaf rust and stem rust can be serious problems in irrigated winter wheat.
  • Stripe rust and leaf rust continue to develop in the southern plains.
3A reddish-brown colour: [in combination]: her rust-coloured coat
More example sentences
  • The turbulent gray and rust coloured swirls of gas are truly awesome.
  • Or how about cracking open a crab and stuffing its white and rust coloured meat into a baguette with watercress, mustard and cress and lamb lettuce and dressed with lime juice.
  • Earthy tones such as rust, brown, beige, khaki, and tan are not only the coziest colors you can decorate your apartment in, but they're also in style right now.


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Be affected with rust: the blades had rusted away (as adjective rusting) rusting machinery
More example sentences
  • All vehicles in the town had to stay there until they rusted away.
  • The source of the oil is unknown and is thought to have possibly sprung from an old wreck lying on the seabed which has rusted away.
  • Without the right protection, the Tin Man in the Wizard of Oz would have rusted away.
corrode, oxidize, become rusty, tarnish;


Old English rūst, of Germanic origin; related to Dutch roest, German Rost, also to red.



More example sentences
  • Stainless steel spoke cost about three times as much as rustless spokes.

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