|Noah Webster's Dictionary|
1. (n.) A dwelling place, -- whether a part or whole of a house or other shelter.
2. (n.) The house of the lord of a manor; a manor house; hence: Any house of considerable size or pretension.
3. (n.) A twelfth part of the heavens; a house. See House.
4. (n.) The place in the heavens occupied each day by the moon in its monthly revolution.
5. (v. i.) To dwell; to reside.
Int. Standard Bible Encyclopedia
man'-shun (mone, "abode"): In John 14:2, the word is used in the plural: "In my Father's house are many mansions," the Revised Version margin "abiding places." The ideas conveyed are those of abundance of room, and permanence of habitation, in the heavenly world.
Mansion (1 Occurrence)
Psalms 49:14 They are appointed as a flock for Sheol. Death shall be their shepherd. The upright shall have dominion over them in the morning. Their beauty shall decay in Sheol, far from their mansion. (WEB NIV)