• Oxidation or discoloration, especially of a decorative metal exposed to air.


  • (intransitive) To oxidize or discolor due to oxidation.

    "Careful storage of silver will prevent it from tarnishing."

  • (intransitive, figuratively) To lose its lustre or attraction; to become dull.
  • (transitive) To soil, sully, damage or compromise

    "He is afraid that he will tarnish his reputation if he disagrees."

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