BARRICADE or BARRICADO, an improvised fortifica tion of earth, paving-stones, trees or any materials ready to hand, thrown up, especially across a street, to hinder the advance of an enemy; in the old wooden warships a fence or wooden rail, supported by stanchions and strengthened by various materials, extending across the quarter-deck as a protection during action. The word is derived from Spanish barrica, "a cask," casks filled with earth having been early used to form barricades.