Source : Webster's Revised Unabridged Dictionary (1913)

Stockade \Stock*ade"\, n. [F. estacade stockade, boom (confused
   in French with estocade; see 1st {Stoccado}); fr. It.
   steccata a palisade (influenced by OF. estach, estaque, a
   stake, post), or from Sp. estacada a palisade; both of German
   origin, and akin to E. stake, stick; cf. G. stecken stick,
   OHG. steccho. See {Stake}, n., {Stick}, n. & v. t., and cf.
   {Estacade}, {Stacket}.]
   1. (Mil.) A line of stout posts or timbers set firmly in the
      earth in contact with each other (and usually with
      loopholes) to form a barrier, or defensive fortification.
      [Written also {stoccade}.]

   2. An inclosure, or pen, made with posts and stakes.

Stockade \Stock*ade"\, v. t. [imp. & p. p. {Stockaded}; p. pr. &
   vb. n. {Stockading}.]
   To surround, fortify, or protect with a stockade.

Source : WordNet®

stockade
     n 1: fortification consisting of a fence made of a line of stout
          posts set firmly for defense
     2: a penal camp where political prisoners or prisoners of war
        are confined (usually under harsh conditions) [syn: {concentration
        camp}]
     v : surround with a stockade in order to fortify