Icy; consisting of ice; frozen; hence, resembling ice; figuratively, having a cold, glassy look or manner.In geology, referring to ice; associated with the geological agency of ice.Of or relating to a glacier or an ice-sheet.In chem., assuming the solid state as a result of concentration: used chiefly of certain acids (as acetic, sulphuric, and phosphoric acids) which are commonly seen as liquids but solidify at low temperatures when concentrated by removal of water.