extant, surviving

Webster's Dictionary (GCIDE)

1.having existence or being or actuality; as, much of the beluga caviar existing in the world is found in the Soviet Union and Iran. Opposite of nonexistent. [Narrower terms: active, alive; extant, surviving] Also See: extant.

Syn: existent. [WordNet 1.5]

2.Present. Opposite of absent. [WordNet 1.5]

3.Presently existing; as, the existing system. [WordNet 1.5]