Meaning of “wallpaper” - Learner’s Dictionary

wallpaper

noun [ C, U ] uk us /ˈwɔːlˌpeɪpər/
PAPER

paper, usually with a pattern, that you decorate walls with

COMPUTER

a design or image that you choose to appear on the screen of your computer

wallpaper verb [ T ]

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