The Collaborative International Dictionary of English v.0.48:

Stowage \Stow"age\, n.
   1. The act or method of stowing; as, the stowage of
      provisions in a vessel.
      [1913 Webster]

   2. Room in which things may be stowed. --Cook.
      [1913 Webster]

            In every vessel is stowage for immense treasures.
                                                  --Addison.
      [1913 Webster]

   3. The state of being stowed, or put away. "To have them in
      safe stowage." --Shak.
      [1913 Webster]

   4. Things stowed or packed. --Beau. & Fl.
      [1913 Webster]

   5. Money paid for stowing goods.
      [1913 Webster]

WordNet (r) 3.0 (2006):

stowage
    n 1: the charge for stowing goods
    2: a room in which things are stored [syn: storeroom, storage
       room, stowage]
    3: the act of packing or storing away [syn: stowage,
       stowing]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "stowage":
   accommodation, allocation, assignment, burden, capacity,
   cold storage, collocation, conservation, content, cordage, custody,
   dead storage, deployment, deposit, deposition, disposition,
   dry storage, emplacement, guardianship, lading, limit, loading,
   localization, locating, location, measure, packing, pinpointing,
   placement, placing, positioning, posting, poundage, preservation,
   putting, quantity, reposition, room, safekeeping, shelf-room,
   situation, space, spotting, stationing, storage, storage space,
   tonnage, volume, warehousing



Bouvier's Law Dictionary, Revised 6th Ed (1856):

STOWAGE, mar. law. The proper arrangement in a ship, of the different
articles of which a cargo consists, so that they may not injure each other
by friction, or be damaged by the leakage of the ship.
     2. The master of the ship is bound to attend to the stowage, unless, by
custom or agreement, this business is to be performed by persons employed by
the merchant. Abbott on Ship. 228; Pardes. Dr. Com. n. 721.