Operating or existing for a brief period only; temporary.
Opening out to form a three-dimensional structure when the page of a book is opened.
Coming into view suddenly from a concealed position.
Employing the cold launch technique.
A folded paper element which pops up from a book, greeting card, etc.
A pop-up ball: a ball that has been hit to a considerable height above the infield or the shallow outfield; a pop fly.
A business that quickly pops up, such as a temporary restaurant.
A pop-up advertisement; an advertisement that is triggered to appear on a computer screen when an Internet user accesses a particular web page.
Operating by computer or in cyberspace; not physically present.
Having the power of acting or of invisible efficacy without the agency of the material or measurable part; potential.
Nearly, almost. (A relatively recent development in meaning)
Pertaining to particles in temporary existence due to the Heisenberg uncertainty principle.
Simulated in a computer or online.
In effect or essence, if not in fact or reality; imitated, simulated.
Capable of being overridden with a different implementation in a subclass.
A computer simulation of a real-world sport such as horse racing.
A virtual member function of a class.