What does the word rust mean?

Usage examples for rust

  1. What business had he to seek affection, to require the faithfulness of a rust- colored mongrel? – A Top-Floor Idyl by George van Schaick
  2. Raw eggs, rest, and rust. – Calvary Alley by Alice Hegan Rice
  3. Her hair had the rust of gold and the dust of sun, and radiated light and glints of love. – H. R. by Edwin Lefevre