Definitionen
1.NounOxidation or discoloration, especially of a decorative metal exposed to air.
2.VerbTo oxidize or discolor due to oxidation."Careful storage of silver will prevent it from tarnishing."
3.VerbTo compromise, damage, soil, or sully."He is afraid that she will tarnish his reputation if he disagrees with her."
4.VerbTo lose its lustre or attraction; to become dull.
5.VerbTo use a sign, image, expression, etc. sufficiently close to a trademarked one that it brings disrepute to it.