Dictionary![]() ![]() cul-de-sacPronunciation: (kul'du-sak', -sak", kool'-; Fr. kydu-sak'), [key] —n., —pl. culs-de-sacPronunciation: (kulz'du-sak', -sak", koolz'-; Fr. kydu-sak'). [key] 1. a street, lane, etc., closed at one end; blind alley; dead-end street. 2. any situation in which further progress is impossible. 3. the hemming in of a military force on all sides except behind. 4. Anat.a saclike cavity, tube, or the like, open only at one end, as the cecum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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