1. Currently in existence
   "the existing system"
    
2. Having existence, 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 reality; have an existence, be extant
   "Dinosaurs no longer exist";
   - be
    
2. Support oneself, esp. at a minimal level
   "he could barely exist on such a low wage";
   - survive, live, subsist

See also: active, alive, being, beingness, existence, extant, face of the earth, present

Encyclopedia: Existing