Bedeutung von “pop-up” — Learner’s Dictionary

pop-up

adjective [ always before noun ] us uk /ˈpɒpʌp/
BOOK

A pop-up book is a book that has pictures that stand up from the pages when the book is opened.

COMPUTER

A pop-up menu is a list of choices on a computer screen that is hidden until you choose to look at it:

Select the option you want from the pop-up menu.

(Definition von “pop-up adjective” aus dem Cambridge Learner's Dictionary © Cambridge University Press)