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. A short high fly ball
   - pop fly, pop-fly

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

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

Type of: appear, book, fly, fly ball

Encyclopedia: Pop up

• genus Diplopterygium
• genus Diplotaxis
• genus Dipodomys
• genus Dipogon
• genus Dipsacus
• genus Dipsosaurus
• genus Dipteronia
• genus Dipteryx
• genus Dipus
• genus Dirca
• genus Disa
• genus Discina
• genus Dodonaea
• genus Dolichonyx
• genus Dolichos
• genus Dolichotis
• genus Doliolum
• genus Dombeya
• genus Doodia
• genus Doronicum
• genus Dorotheanthus
• genus Doryopteris
• genus Dovyalis
• genus Draba
• genus Dracaena