noun (n)

• a book written by Sir Thomas More (1516) describing the perfect society on an imaginary island(noun.communication)

  source: wordnet30
• ideally perfect state; especially in its social and political and moral aspects(noun.state)

  Antonym:
  dystopia
  

  source: wordnet30
• a work of fiction describing a utopia(noun.communication)

  source: wordnet30
• an imaginary place considered to be perfect or ideal(noun.cognition)

  Synonym:
  sion, zion
  

  source: wordnet30
• An imaginary island, represented by Sir Thomas More, in a work called Utopia, as enjoying the greatest perfection in politics, laws, and the like. See Utopia, in the Dictionary of Noted Names in Fiction.(noun)

  source: webster1913