rust

Adjective

• of the brown color of rust

Noun

• any of various fungi causing rust disease in plants

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

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

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

Verb

• become coated with oxide

• 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
    

• become destroyed by water, air, or a corrosive such as an acid
  • The metal corroded
    
  • The pipes rusted
    

Related words

• Synonyms: 
  rusty , rust-brown , rust fungus , rusting , corrode , eat