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]

WordNet (r) 3.0 (2006):

palace
    n 1: a large and stately mansion [syn: palace, castle]
    2: the governing group of a kingdom; "the palace issued an order
       binding on all subjects"
    3: a large ornate exhibition hall
    4: official residence of an exalted person (as a sovereign)

The Free On-line Dictionary of Computing (19 January 2023):

Palace

    A proprietary multi-user virtual
   reality-like talk system.

   The Palace is distinguished from most other VR-like systems in
   that it is only two-dimensional rather than three; rooms,
   avatars, and "props" are made up of relatively small 2D
   bitmap images.

   Palace is a crude hack, or lightweight, depending on
   your point of view.

   (http://thepalace.com/).

   (1997-09-14)


The Devil's Dictionary (1881-1906):

PALACE, n.  A fine and costly residence, particularly that of a great
official.  The residence of a high dignitary of the Christian Church
is called a palace; that of the Founder of his religion was known as a
field, or wayside.  There is progress.