noun (n)

• the state of being unconnected in memory or imagination(noun.state)

  Example:
  I could not think of him in disassociation from his wife.
  

  Antonym:
  association
  

  source: wordnet30
• a state in which some integrated part of a person's life becomes separated from the rest of the personality and functions independently(noun.state)

  Synonym:
  dissociation
  

  source: wordnet30