Source : Webster's Revised Unabridged Dictionary (1913)

Quartermaster \Quar"ter*mas`ter\, n. [Quarter + master: cf. F.
   quartier-ma[^i]tre.]
   1. (Mil.) An officer whose duty is to provide quarters,
      provisions, storage, clothing, fuel, stationery, and
      transportation for a regiment or other body of troops, and
      superintend the supplies.

   2. (Naut.) A petty officer who attends to the helm, binnacle,
      signals, and the like, under the direction of the master.
      --Totten.

   {Quartermaster general} (Mil.), in the United States a staff
      officer, who has the rank of brigadier general and is the
      chief officer in the quartermaster's department; in
      England, an officer of high rank stationed at the War
      Office having similar duties; also, a staff officer,
      usually a general officer, accompanying each complete army
      in the field.

   {Quartermaster sergeant}. See {Sergeant}.

Source : WordNet®

quartermaster general
     n : a staff officer in charge of supplies for a whole army