MANSION

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.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.