- The definition of a cul de sac is a dead end street.
An example of a cul de sac is a street that ends in a circle instead of going into another street.
nounpl. cul-de-sacs cul-de-sacs or culs-de-sac
- a. A dead-end street.b. An impasse: “This was the cul-de-sac the year kept driving me toward: men and women would always be at odds” (Philip Weiss).
- Anatomy A saclike cavity or tube open only at one end.
Origin of cul-de-sacFrench : cul, bottom (from Old French, from Latin cūlus; see culet) + de, of (from Old French, from Latin dē; see de–) + sac, sack (from Old French, from Latin saccus; see sack1).
- Alternative spelling of cul-de-sac.
(plural cul-de-sacs or culs-de-sac)