steely 1 Participle of steel . 2 adj. Applied particularly to steel blades or their blades, made of steel. 3 With some steel. 4 The appearance or qualities of steel. 5 Applied to words, language, wit, humor, intention, etc., and to people by them, of aggressive intention and skillfully directed for this purpose, although without violence in form. Incisive, biting 6 m Action and effect of steel iron.