Source : Webster's Revised Unabridged Dictionary (1913)

Passing \Pass"ing\, n.
   The act of one who, or that which, passes; the act of going
   by or away.

   {Passing bell}, a tolling of a bell to announce that a soul
      is passing, or has passed, from its body (formerly done to
      invoke prayers for the dying); also, a tolling during the
      passing of a funeral procession to the grave, or during
      funeral ceremonies. --Sir W. Scott. --Longfellow.