Source : Webster's Revised Unabridged Dictionary (1913)

Hacienda \Ha`ci*en"da\ (? or ?), n. [Sp., fr. OSp. facienda
   employment, estate, fr. L. facienda, pl. of faciendum what is
   to be done, fr. facere to do. See {Fact}.]
   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.

Source : WordNet®

hacienda
     n 1: a large estate in Spanish-speaking countries
     2: the main house on a ranch or large estate