Noah Webster's Dictionary (n.) Gradual decay; rusting; the action or effect of corrosive agents, or the process of corrosive change; as, the rusting of iron is a variety of corrosion.

Multi-Version Concordance Corrosion (1 Occurrence) James 5:3 Your gold and your silver are corroded, and their corrosion will be for a testimony against you, and will eat your flesh like fire. You have laid up your treasure in the last days. (WEB NIV)