From WordNet (r) 2.0 (August 2003) [wn]:
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]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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.
[1913 Webster]