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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
   - pop-up book
    
2. (baseball) a short high fly ball
   - pop fly, pop-fly
    
3. A store that is open for a limited period of time on temporary premises

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

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

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

Encyclopedia: Pop-up