1. Appear suddenly or unexpectedly; happen unexpectedly
   "He suddenly popped up out of nowhere";
   - crop up, pop, pop out, burst out

1. A book (usually for children) that contains one or more pages such that a three-dimensional structure rises up when a page is opened
   "The children were delighted by the intricate pop-up book about dinosaurs";
   - pop-up book
    
2. (baseball) a short high fly ball
   "The infielder called for the pop-up and made the catch";
   - pop fly, pop-fly
    
3. A store that is open for a limited period of time on temporary premises
   "The fashion brand launched a pop-up to showcase their new collection"

Derived forms: popping up, popped up, pops up, pop-ups

Type of: appear, book, fly, fly ball, shop, store

Encyclopedia: Pop up