A large house or building, usually built for the wealthy. / (UK) A luxurious flat (apartment). / (Hong Kong, only used in names) An apartment building.

plural of mansion

The practice of demolishing smaller, older houses in a neighbourhood and replacing them with new ones that occupy the maximum amount of lot space possible and dwarf surrounding dwellings.

(in combination) Having a specified number or kind of mansions.

Any ostentatious or pretentious home. / The White House.

(astronomy, astrology) a segment of the ecliptic (often called a station or house) through which the moon moves in its orbit around the earth, often used by ancient cultures as part of their calendar system.

plural of lunar mansion

plural of executive mansion

plural of tract mansion

(US) A very large and luxurious tract house.