The Collaborative International Dictionary of English v.0.48:

Depot \De"pot\ (d[=e]"p[-o]; French d[asl]*p[=o]"; 277), n. [F.
   d['e]p[^o]t, OF. depost, fr. L. depositum a deposit. See
   Deposit, n.]
   1. A place of deposit for the storing of goods; a warehouse;
      a storehouse.
      [1913 Webster]

            The islands of Guernsey and Jersey are at present
            the great depots of this kingdom.     --Brit. Critic
                                                  (1794).
      [1913 Webster]

   2. (Mil.)
      (a) A military station where stores and provisions are
          kept, or where recruits are assembled and drilled.
      (b) (Eng. & France) The headquarters of a regiment, where
          all supplies are received and distributed, recruits
          are assembled and instructed, infirm or disabled
          soldiers are taken care of, and all the wants of the
          regiment are provided for.
          [1913 Webster]

   3. A railway station; a building for the accommodation and
      protection of railway passengers or freight. [U. S.]

   Syn: See Station.
        [1913 Webster]

WordNet (r) 3.0 (2006):

depot
    n 1: station where transport vehicles load or unload passengers
         or goods [syn: terminal, terminus, depot]
    2: a depository for goods; "storehouses were built close to the
       docks" [syn: storehouse, depot, entrepot, storage,
       store]