noun (n)

• an activity that diverts or amuses or stimulates(noun.act)

  Example:
  Scuba diving is provided as a diversion for tourists.
  

  Synonym:
  recreation
  

  source: wordnet30
• a turning aside (of your course or attention or concern)(noun.act)

  Example:
  A diversion from the main highway.
  

  Synonym:
  deflection, deflexion, deviation, digression, divagation
  

  source: wordnet30
• an attack calculated to draw enemy defense away from the point of the principal attack(noun.act)

  Synonym:
  diversionary attack
  

  source: wordnet30
• The act of turning aside from any course, occupation, or object; as, the diversion of a stream from its channel; diversion of the mind from business.(noun)

  source: webster1913