Corrosive \Cor*ro"sive\, n. 1. That which has the quality of eating or wearing away gradually. [Corrosives] act either directly, by chemically destroying the part, or indirectly by causing inflammation and gangrene. --Dunglison. 2. That which has the power of fretting or irritating. Such speeches . . . are grievous corrosives. --Hooker. -- {Cor*ro"sive*ly}, adv. -- {Cor*ro"sive*ness}, n.