noun (n)

• a large and stately mansion(noun.artifact)

  Synonym:
  castle
  

  source: wordnet30
• the governing group of a kingdom(noun.group)

  Example:
  The palace issued an order binding on all subjects.
  

  source: wordnet30
• a large ornate exhibition hall(noun.artifact)

  source: wordnet30
• official residence of an exalted person (as a sovereign)(noun.artifact)

  source: wordnet30
• 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.(noun)

  source: webster1913