Cul-de-sac \Cul`-de-sac"\ (ku`de-s?k" or kul`de-s?k"), n.; pl.
   Culs-de-sac (ku`- or kulz`-). [ F., lit., bottom of a bag.]
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   1. A passage with only one outlet, as a street closed at one
      end; a blind alley; hence, a trap.
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   2. (Mil.) a position in which an army finds itself with no
      way of exit but to the front.
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   3. (Anat.) Any bag-shaped or tubular cavity, vessel, or
      organ, open only at one end.
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