noun (n)

• the act of removing from association(noun.act)

  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:
  disassociation
  

  source: wordnet30
• (chemistry) the temporary or reversible process in which a molecule or ion is broken down into smaller molecules or ions(noun.process)

  source: wordnet30
• The act of dissociating or disuniting; a state of separation; disunion.(noun)

  source: webster1913