Source : Webster's Revised Unabridged Dictionary (1913)

Gambison \Gam"bi*son\, n. [OF. gambeson, gambaison, fr. gambais,
   wambais, of German origin: cf. MHG. wambeis, G. wams doublet,
   fr. OHG. wamba, stomach. See {Womb}.]
   A defensive garment formerly in use for the body, made of
   cloth stuffed and quilted.