WordWeb Online

1. Presently existing
   "the existing system"
    
2. Having existence or being or actuality
   "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
   - existent
    
3. Existing in something specified
   "depletion of the oxygen existing in the bloodstream"

1. Have an existence, be extant
   - be
    
2. Support oneself
   "he could barely exist on such a low wage"
   - survive, live, subsist

See also: active, alive, being, beingness, existence, existent, extant, present

Encyclopedia: Exist