From The Collaborative International Dictionary of English v.0.48:
Palace \Pal"ace\ (p[a^]l"[asl]s; 48), n. [OE. palais, F. palais, fr. L. palatium, fr. Palatium, one of the seven hills of Rome, on which Augustus had his residence. Cf. Paladin.] [1913 Webster] 1. 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. --Chaucer. [1913 Webster]
2. The official residence of a bishop or other distinguished personage. [1913 Webster]
3. Loosely, any unusually magnificent or stately house. [1913 Webster]
Palace car. See under Car.
Palace court, a court having jurisdiction of personal actions arising within twelve miles of the palace at Whitehall. The court was abolished in 1849. [Eng.] --Mozley & W. [1913 Webster]