Source : Webster's Revised Unabridged Dictionary (1913)

Gabardine \Gab`ar*dine"\, Gaberdine \Gab`er*dine"\, n. [Sp.
   gabardina; cf. It. gavardina, OF. galvardine, calvardine,
   gavardine, galeverdine; perh. akin to Sp. & OF. gaban a sort
   of cloak or coat for rainy weather, F. caban great coat with
   a hood and sleeves, It. gabbano and perh. to E. cabin.]
   A coarse frock or loose upper garment formerly worn by Jews;
   a mean dress. --Shak.

Source : WordNet®

gabardine
     n 1: a firm durable fabric with a twill weave
     2: (usually in the plural) trousers [syn: {flannel}, {tweed}, {white}]
     3: a loose coverall (coat or frock) reaching down to the ankles
        [syn: {duster}, {gaberdine}, {smock}, {dust coat}]