English to English

noun (n)

• the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment(noun.attribute)

  Antonym:
  inability, unfitness
  

  source: wordnet30
• possession of the qualities (especially mental qualities) required to do something or get something done(noun.cognition)

  Synonym:
  power
  Antonym:
  inability
  

  source: wordnet30
• The quality or state of being able; power to perform, whether physical, moral, intellectual, conventional, or legal; capacity; skill or competence in doing; sufficiency of strength, skill, resources, etc.; -- in the plural, faculty, talent.(noun)

  source: webster1913