Source : Webster's Revised Unabridged Dictionary (1913)

Doubling \Dou"bling\, n.
   1. The act of one that doubles; a making double;
      reduplication; also, that which is doubled.

   2. A turning and winding; as, the doubling of a hunted hare;
      shift; trick; artifice. --Dryden.

   3. (Her.) The lining of the mantle borne about the shield or
      escutcheon.

   4. The process of redistilling spirits, to improve the
      strength and flavor.

   {Doubling a cape}, {promontory}, etc. (Naut.), sailing around
      or passing beyond a cape, promontory, etc.