noun (n)

• intelligence as revealed by quickness and alertness of mind(noun.cognition)

  Example:
  Nimbleness of wit and imagination.
  

  Synonym:
  mental dexterity
  

  source: wordnet30
• the gracefulness of a person or animal that is quick and nimble(noun.attribute)

  Synonym:
  agility, legerity, lightness, lightsomeness
  

  source: wordnet30
• The quality of being nimble; lightness and quickness in motion; agility; swiftness.(noun)

  source: webster1913