noun (n)

• the feeling of being alienated from other people(noun.feeling)

  Synonym:
  disaffection, estrangement
  

  source: wordnet30
• separation resulting from hostility(noun.state)

  Synonym:
  estrangement
  

  source: wordnet30
• (law) the voluntary and absolute transfer of title and possession of real property from one person to another(noun.act)

  Example:
  The power of alienation is an essential ingredient of ownership.
  

  source: wordnet30
• the action of alienating; the action of causing to become unfriendly(noun.act)

  source: wordnet30
• The act of alienating, or the state of being alienated.(noun)

  source: webster1913