Meaning of “eraser” - Learner’s Dictionary

eraser

noun [ C ] uk us /ɪˈreɪzər/ US  /ɪˈreɪsər/ US (UK rubber)
PENCIL

a small object that is used to remove pencil marks from paper

BOARD

an object that is used to remove marks from a board that teachers write on

(Definition of “eraser” from the Cambridge Learner’s Dictionary © Cambridge University Press)