Definition of mansion

• n. - A dwelling place, -- whether a part or whole of a house or other shelter.
• n. - The house of the lord of a manor; a manor house; hence: Any house of considerable size or pretension.
• n. - A twelfth part of the heavens; a house. See 1st House, 8.
• n. - The place in the heavens occupied each day by the moon in its monthly revolution.
• v. i. - To dwell; to reside.