From The Collaborative International Dictionary of English v.0.48 [gcide]:
Pueblo \Pueb"lo\, n. [Sp., a village, L. populus people. See
People.]
A communistic building erected by certain Indian tribes of
Arizona and New Mexico. It is often of large size and several
stories high, and is usually built either of stone or adobe.
The term is also applied to any Indian village in the same
region.
[1913 Webster]
Pueblo Indians (Ethnol.), any tribe or community of Indians
living in pueblos. The principal Pueblo tribes are the
Moqui, the Zu[~n]i, the Keran, and the Tewan.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
Pueblo
n 1: a member of any of about two dozen Native American peoples
called `Pueblos' by the Spanish because they live in
pueblos (villages built of adobe and rock)
2: a city in Colorado to the south of Colorado Springs
3: a communal village built by Indians in the southwestern
United States