The Collaborative International Dictionary of English v.0.48:

Chow \Chow\, n. [Chin. chou.]
   1. A prefecture or district of the second rank in China, or
      the chief city of such a district; -- often part of the
      name of a city, as in Foochow.
      [Webster 1913 Suppl.]

   2. a breed of thick-coated medium-sized dogs with fluffy
      curled tails and distinctive blue-black tongues; -- same
      as chowchow[3], n..
      [PJC]

WordNet (r) 3.0 (2006):

Chow
    n 1: the imperial dynasty of China from 1122 to 221 BC; notable
         for the rise of Confucianism and Taoism [syn: Zhou, Zhou
         dynasty, Chou, Chou dynasty, Chow, Chow dynasty]
    2: informal terms for a meal [syn: chow, chuck, eats,
       grub]
    3: breed of medium-sized dogs with a thick coat and fluffy
       curled tails and distinctive blue-black tongues; believed to
       have originated in northern China [syn: chow, chow chow]