eraser [erasererasers] BrE [ɪˈreɪzə(r)] NAmE [ɪˈreɪsər] (NAmE or formal) (BrE also rub·ber) noun a small piece of rubber or a similar substance, used for removing pencil marks from paper; a piece of soft material used for removing ↑chalk marks from a ↑blackboard See also: ↑rubber