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Definition of Pop-up

A form of online advertising where the advert pops up in a separate browser window when you go to a particular webpage. Many people find it intensely irritating, and some browsers now have the ability to block pop-ups from opening.

Computer Science

Other definitions of Pop-up

A new instance of the browser that occurs in the foreground of an html environment. Pop-up items include pop-up ads, pop-up forms, and other graphical browser-based items.

Computer Science