pop-up
UK: ˈpɒpʌp | US: ˈpɑːpʌp
n. 1. A graphical or textual element that appears suddenly over a window or webpage.
n. 2. A small, temporary retail space or event.
adj. 3. Designed to spring open or appear suddenly (e.g., pop-up book).
The term "pop-up" combines the verb "pop" (from Middle English "poppen," meaning to strike or burst suddenly) with the adverb "up." Originally used for mechanical devices (e.g., pop-up toasters), it later extended to digital interfaces (pop-up ads) and ephemeral retail spaces. The morphemes vividly capture the action of something appearing abruptly in an upward or visible manner.
A pop-up ad interrupted my browsing session.
The city hosts seasonal pop-up markets for local artisans.
Children love books with pop-up illustrations.
She opened a pop-up shop to test her new product line.
The notification popped up on my screen unexpectedly.