noun (n)

• an event that results in a transformation(noun.event)

  Synonym:
  changeover, transition
  

  source: wordnet30
• a change in the units or form of an expression:(noun.cognition)

  Example:
  Conversion from Fahrenheit to Centigrade.
  

  source: wordnet30
• a successful free throw or try for point after a touchdown(noun.act)

  source: wordnet30
• a spiritual enlightenment causing a person to lead a new life(noun.act)

  Synonym:
  rebirth, spiritual rebirth
  

  source: wordnet30
• (psychiatry) a defense mechanism represses emotional conflicts which are then converted into physical symptoms that have no organic basis(noun.process)

  source: wordnet30
• a change of religion(noun.event)

  Example:
  His conversion to the Catholic faith.
  

  source: wordnet30
• interchange of subject and predicate of a proposition(noun.communication)

  source: wordnet30
• act of exchanging one type of money or security for another(noun.act)

  source: wordnet30
• the act of changing from one use or function or purpose to another(noun.act)

  source: wordnet30
• The act of turning or changing from one state or condition to another, or the state of being changed; transmutation; change.(noun)

  source: webster1913