Crossover (disambiguation)
Crossover could refer to:

In-universe
 Crossover, a term used in the mirror universe to describe traveling between universes
 Crossover bridge, an architectural structure found on DS9
 Subspace crossover shunt, a device used to link to a computer

Real world
 , the DS9 episode
 Crossover (novel), the Pocket TNG novel
 Star Trek - Crossovers Set, a VHS collection based on character crossover appearances