Source : Webster's Revised Unabridged Dictionary (1913)

Barricade \Bar`ri*cade"\, v. t. [imp. & p. p. {Barricaded}; p.
   pr. & vb. n. {Barricading}.] [Cf. F. barricader. See
   {Barricade}, n.]
   To fortify or close with a barricade or with barricades; to
   stop up, as a passage; to obstruct; as, the workmen
   barricaded the streets of Paris.

         The further end whereof [a bridge] was barricaded with
         barrels.                                 --Hakluyt.

Barricade \Bar`ri*cade"\, n. [F. barricade, fr. Sp. barricada,
   orig. a barring up with casks; fr. barrica cask, perh. fr.
   LL. barra bar. See {Bar}, n., and cf. {Barrel}, n.]
   1. (Mil.) A fortification, made in haste, of trees, earth,
      palisades, wagons, or anything that will obstruct the
      progress or attack of an enemy. It is usually an
      obstruction formed in streets to block an enemy's access.

   2. Any bar, obstruction, or means of defense.

            Such a barricade as would greatly annoy, or
            absolutely stop, the currents of the atmosphere.
                                                  --Derham.

Source : WordNet®

barricade
     n 1: a barrier set up by police to stop traffic on a street or
          road in order to catch a fugitive or inspect traffic
          etc. [syn: {roadblock}]
     2: a barrier (usually thrown up hastily so as to impede the
        advance of an enemy); "they enemy stormed the barricade"
     v 1: render unsuitable for passage; "block the way"; "barricade
          the streets"; "stop the busy road" [syn: {block}, {blockade},
           {stop}, {block off}, {block up}, {bar}]
     2: prevent access to by barricading; "The street where the
        President lives is always barricaded"
     3: block off with barricades [syn: {barricado}]