pop-up

Meanings

1. Coming into view suddenly from a concealed position.
2. Opening out to form a three-dimensional structure when the page of a book is opened.
3. Operating or existing for a brief period only; temporary.
4. Employing the cold launch technique.

1. A pop-up advertisement; an advertisement that is triggered to appear on a computer screen when the user accesses a particular web page.
2. A pop-up ball: a ball that has been hit to a considerable height above the infield or the shallow outfield; a pop fly.
3. A folded paper element which pops up from a book, greeting card, etc.
4. A business that opens for a brief temporary period only, such as a temporary restaurant.

Etymology

Deverbal from pop up.