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Adjective rust has 1 sense
  1. rust, rusty - of the color of rust
    Antonym: achromatic (indirect, via chromatic)
Noun rust has 4 senses
  1. rust - a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
    --1 is a kind of
    ferric oxide
    --1 has substances: goethite, gothite
    Derived forms: verb rust3, verb rust2, verb rust1
  2. rust - a reddish-brown discoloration of leaves and stems caused by a rust fungus
    --2 is a kind of
    plant disease
    --2 has particulars: blister rust, white-pine rust, white pine blister rust
  3. rust, rusting - the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
    --3 is a kind of corrosion, corroding, erosion; oxidation, oxidization, oxidisation
    --3 has substances: ferric oxide
    Derived forms: verb rust3, verb rust2, verb rust1
  4. rust, rust fungus - any of various fungi causing rust disease in plants
    --4 is a kind of fungus
    --4 is a member of Uredinales, order Uredinales
    --4 has parts: aecium; aeciospore
    --4 has particulars:
     flax rust, flax rust fungus, Melampsora lini; blister rust, Cronartium ribicola; wheat rust, Puccinia graminis; apple rust, cedar-apple rust, Gymnosporangium juniperi-virginianae
Verb rust has 3 senses
  1. corrode, rust - become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded"; "The pipes rusted"
    --1 is one way to decay, crumble, delapidate
    Derived forms: noun rust3, noun rust1
    Sample sentence:
    These cars won't rust
  2. corrode, eat, rust - 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"
    --2 is one way to damage
    Derived forms: noun rust1, noun rust3
    Sample sentence:
    Something ----s something
  3. rust - become coated with oxide
    --3 is one way to
    oxidise, oxidize, oxidate
    Derived forms: noun rust3, noun rust1
    Sample sentence:
    Something ----s
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