A circular area at the end of a dead end street to allow cars to turn around, designed so children can play on the street, with little or no through-traffic.
(medicine) A sack-like cavity or tube open at one end only.
Esimerkit
And in suburbs known for new development, preservationists are often battling a general perception that there is nothing historic or worth saving among the cul-de-sacs.
Physics seems, in fact, to have got itself into a cul-de-sac, obsessing over theories so mathematically abstruse that nobody even knows how to test them.