Source : Webster's Revised Unabridged Dictionary (1913)

Existence \Ex*ist"ence\, n. [Cf. F. existence.]
   1. The state of existing or being; actual possession of
      being; continuance in being; as, the existence of body and
      of soul in union; the separate existence of the soul;
      immortal existence.

            The main object of our existence.     --Lubbock.

   2. Continued or repeated manifestation; occurrence, as of
      events of any kind; as, the existence of a calamity or of
      a state of war.

            The existence therefore, of a phenomenon, is but
            another word for its being perceived, or for the
            inferred possibility of perceiving it. --J. S. Mill.

   3. That which exists; a being; a creature; an entity; as,
      living existences.

Source : WordNet®

existence
     n 1: the state or fact of existing; "a point of view gradually
          coming into being"; "laws in existence for centuries"
          [syn: {being}, {beingness}] [ant: {nonexistence}, {nonbeing}]
     2: everything that exists anywhere; "they study the evolution
        of the universe"; "the biggest tree in existence" [syn: {universe},
         {creation}, {world}, {cosmos}, {macrocosm}]