mansion
Concise Oxford English Dictionary © 2008 Oxford University Press:
mansion/ˈmanʃn/
▶noun
- 1 a large, impressive house.
- 2 (mansion block) Brit. a large block of flats.
- 3 (in names) a terrace or mansion block: Carlyle Mansions.
– origin ME (denoting the chief residence of a lord): via OFr. from L. mansio(n-) ‘place where someone stays’, from manere ‘remain’.
'mansion' also found in these Oxford entries:

