1 the official residence of a sovereign, president, archbishop, or bishop.
2 a splendid mansion; a spacious building.
Phrases and idioms:
palace revolution (or coup) the (usu. non-violent) overthrow of a sovereign, government, etc. at the hands of senior officials.
Etymology: ME f. OF palais f. L Palatium Palatine (hill) in Rome where the house of the emperor was situated
Useful english dictionary. 2012.