Definition of: mansion

(man′shən) noun
1. A large or handsome dwelling; specifically, the house of the lord of a manor; a manor-house.
2. In astrology, one of the 12 divisions of the heavens; a house.
3. According to Oriental and medieval astronomers, one of the 28 divisions of the heavens occupied by the moon on successive days.
4. Archaic Any place of abode.
5. A small compartment, abode, or dwelling in a larger house or enclosure.
6. plural Brit. An apartment house. See synonyms under HOUSE. [<OF <L mansio, -onis a dwelling <mansus, pp. of manere remain, dwell. Doublet of MENAGE.]