cul-de-sac: Meaning and Definition of

cul-de-sac

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. a saclike cavity, tube, or the like, open only at one end, as the cecum.