corrosive UK /kəˈɹəʊsɪv/US /kəˈɹoʊsɪv/adjective 3noun 2forms 3 adjective3 •Eating away; having the power of gradually wearing, hanging, or destroying the texture or substance of a body; as the corrosive action of an acid. •Destroying or undermining something gradually. •Having the quality of fretting or vexing.Care is no cure, but corrosive. — 1591 noun2 •That which has the quality of eating or wearing away gradually. •Any solid, liquid or gas capable of irreparably harming living tissues or damaging material on contact. formscorrosives · more corrosive · most corrosive