Source : Webster's Revised Unabridged Dictionary (1913)

Sedan \Se*dan"\, n. [Said to be named from Sedan, in France,
   where it was first made, and whence it was introduced into
   England in the time of King Charles I.]
   A portable chair or covered vehicle for carrying a single
   person, -- usually borne on poles by two men. Called also
   {sedan chair}.

Source : WordNet®

sedan
     n 1: a car that is closed and that has front and rear seats and
          two or four doors
     2: a closed litter for one passenger [syn: {sedan chair}]