from The Century Dictionary.

  • noun In fort, a ditch covered with a parapet, serving as a means of communication between two trenches, especially between the first and third parallels. Also called a zigzag or an approach.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Fort.) A winding or zigzag trench forming a path or communication from one siegework to another, to a magazine, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun military, defense In military fortification, a trench or ditch covered with a parapet that provides communication between two trenches, particularly the rear and front lines. Boyaus were typically constructed in a zigzag pattern to prevent exposure to direct enemy fire from the front.
  • noun A line, drawn winding about, in order to enclose several tracts of land, or to attack some works.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From French.


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  • n. - (pl. -aux ) winding trench; zigzag

    May 16, 2008