Definition of rust in English:

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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.
  • The fungi belong to Puccinia and other genera, order Uredinales, class Teliomycetes.
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.


[no object]
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;



Pronunciation: /ˈrʌs(t)ləs/
Example sentences
  • Stainless steel spoke cost about three times as much as rustless spokes.


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

Words that rhyme with rust

adjust, august, bust, combust, crust, dust, encrust, entrust, gust, just, lust, mistrust, must, robust, thrust, trust, undiscussed

For editors and proofreaders

Line breaks: rust

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