adjective (a)

• having existence or being or actuality(adj.all)

  Example:
  An attempt to refine the existent machinery to make it more efficient.
  

  Synonym:
  existing
  Antonym:
  nonexistent
  

  source: wordnet30
• being or occurring in fact or actuality; having verified existence; not illusory(adj.all)

  Synonym:
  real
  Antonym:
  unreal
  

  source: wordnet30
• presently existing in fact and not merely potential or possible(adj.all)

  Synonym:
  actual
  Antonym:
  possible, potential
  

  source: wordnet30
• Having being or existence; existing; being; occurring now; taking place.(adjective)

  source: webster1913