/man"sheuhn/ , n.
1. a very large, impressive, or stately residence.
2. See manor house .
3. Often, mansions . Brit. a large building with many apartments; apartment house.
4. Oriental and Medieval Astron. each of 28 divisions of the ecliptic occupied by the moon on successive days.
5. Archaic. an abode or dwelling place.
[ 1325-75; ME mansion- (s. of mansio ) an abiding, abode. See MANSE, -ION ]