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wallpaper

noun [U] (COMPUTER)
 
 
/ˈwɔːlˌpeɪ.pər/ US  /ˈwɑːlˌpeɪ.pɚ/ specialized

Definition

a design or image that you choose to appear on the desktop (= main) screen of your computerComputer concepts
(Definition of wallpaper noun (COMPUTER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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