Source : Webster's Revised Unabridged Dictionary (1913)

Apparitor \Ap*par"i*tor\, n. [L., fr. apparere. See {Appear}.]
   1. Formerly, an officer who attended magistrates and judges
      to execute their orders.

            Before any of his apparitors could execute the
            sentence, he was himself summoned away by a sterner
            apparitor to the other world.         --De Quincey.

   2. (Law) A messenger or officer who serves the process of an
      ecclesiastical court. --Bouvier.