- To destroy a metal or alloy gradually, especially by oxidation or chemical action: acid corroding metal. (verb-transitive)
- To impair steadily; deteriorate: "Doubt and mistrust could creep into our lives, corroding personal and professional relationships” ( Philip Taubman). (verb-transitive)
- To be eaten or worn away. (verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.