adjective (a)

• such that comparison is impossible; unsuitable for comparison or lacking features that can be compared(adj.all)

  Example:
  An incomparable week of rest and pleasure.
  The computer proceeds with its incomparable logic and efficiency.
  This report is incomparable with the earlier ones because of different breakdowns of the data.
  

  Synonym:
  uncomparable
  Antonym:
  comparable
  

  source: wordnet30
• Not comparable; admitting of no comparison with others; unapproachably eminent; without a peer or equal; matchless; peerless; transcendent.(adjective)

  source: webster1913