1.  chihuahua(n = noun.location) - a city in northern Mexico in the state of Chihuahua; commercial center of northern Mexico;
is a kind of city, metropolis, urban center
is a part of chihuahua

2.  chihuahua(n = noun.location) - a state in northern Mexico; mostly high plateau;
is a kind of province, state
has parts: chihuahua

3.  chihuahua(n = noun.animal) - an old breed of tiny short-haired dog with protruding eyes from Mexico held to antedate Aztec civilization;
is a kind of toy, toy dog

   an old breed of tiny short-coated dogs with protruding eyes, originating in Mexico, believed to antedate Aztec civilization. [WordNet 1.5]

chihuahua, n.
1 a very small dog of a smooth-haired large-eyed breed originating in Mexico.
2 this breed.

Etymology:
Chihuahua State and city in Mexico