Corrosive/kəˈrəʊsɪv/ Definition 1 of 3Pro Tip 1/2Chemical Harm Use 'corrosive' for chemicals that can damage materials or surfaces. The corrosive chemicals ruined the metal pipes. Pro Tip 2/2Not Always Visible Corrosion may not be immediately noticeable, but it causes gradual damage. Check for any less obvious corrosive damage on the bridge.