noun (n)

• the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior(noun.tops)

  Example:
  We did not understand his motivation.
  

  Synonym:
  motive, need
  

  source: wordnet30
• the condition of being motivated(noun.state)

  Example:
  His motivation was at a high level.
  

  source: wordnet30
• the act of motivating; providing incentive(noun.act)

  Synonym:
  motivating
  

  source: wordnet30