hacienda

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large estate in a Spanish-speaking region.
• noun The house of the owner of such an estate.

from The Century Dictionary.

• noun An estate; a manufacturing, mining, stock-raising, or other establishment in the country; an isolated farm or farm-house. Also called fazeuda.

from the GNU version of the Collaborative International Dictionary of English.

• noun A large estate where work of any kind is done, as agriculture, manufacturing, mining, or raising of animals; a cultivated farm, with a good house, in distinction from a farming establishment with rude huts for herdsmen, etc.; -- a word used in Spanish-American regions.
• noun The main residence of a hacienda{1}.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a large homestead in a ranch or estate usually in places where Colonial Spanish culture has had architectural influence.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the main house on a ranch or large estate
• noun a large estate in Spanish-speaking countries