ironironirons1nounpronunciationThe word iron sounds like lion, because we don't say the letter r in this word. 1(no plural) a strong hard metal: The gates are made of iron.an iron bar2 (pluralirons) a piece of electrical equipment that gets hot and that you use for making clothes smooth: a steam ironironironironsironedironing2verb (irons, ironing, ironed)to make clothes smooth using an iron: Can you iron this shirt for me?▶ ironingnoun (no plural) clothes that need to be ironed: I usually do the ironing on Sunday evening.