1. Tending or having the power to corrode (Merriam-Webster dictionary). 2. A property of materials which can destroy other materials they come into contact with (https://www.ecoonline.com/en-us/glossary/corrosive/). 3. A chemical that causes visible destruction of, or irreversible alterations in living tissue by chemical action at the site of contact. (Cornell Univercity). 4. A corrosive substance causes damage by chemical action (Cambridge dictionary)