n. 1. a. The act or process of corroding. b. The condition produced by corroding. 2. A substance, such as rust, formed by corroding. [Middle English corosioun, corrosion of tissue, from Old French corrosion, from Medieval Latin corrōsiō, corrōsiōn-, the act of gnawing, from Latin corrōsus, past participle of corrōdere, to gnaw away; see CORRODE.] |
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