palace

n. castle, mansion

In English a palace is the home of a head of state or other high-ranking public figure. In some countries, such as Italy, the term is also applied to some private mansions. Many palaces are now put to other uses such as parliaments or museums. The word is also sometimes used to describe a lavish public building which does not house a public figure; this use is intended to convey that the building is a "people's palace", where a sort of civic consciousness resides.
See more at Wikipedia.org...

Noun
1. a large and stately mansion
(synonym) castle
(hypernym) mansion, mansion house, manse, hall, residence
(hyponym) Buckingham Palace
(part-meronym) great hall
2. the governing group of a kingdom; "the palace issued an order binding on all subjects"
(hypernym) government, authorities, regime
3. a large ornate exhibition hall
(hypernym) exhibition hall, exhibition area
4. official residence of an exalted person (as a sovereign)
(hypernym) residence
(hyponym) alcazar

n. luxury hotel

(n.)
The residence of a sovereign, including the lodgings of high officers of state, and rooms for business, as well as halls for ceremony and reception.
  

(n.)
The official residence of a bishop or other distinguished personage.
  

(n.)
Loosely, any unusually magnificent or stately house.