Source : Webster's Revised Unabridged Dictionary (1913)

Keg \Keg\ (k[e^]g), n. [Earlier cag, Icel. kaggi; akin to Sw.
   kagge.]
   A small cask or barrel.

Source : WordNet®

keg
     n 1: the quantity contained in a keg [syn: {kegful}]
     2: small cask or barrel