noun (n)

• thinking something out with care in order to achieve complete understanding of it(noun.cognition)

  source: wordnet30
• the creation of something in the mind(noun.cognition)

  Synonym:
  conception, design, innovation, invention
  

  source: wordnet30
• The act of excogitating; a devising in the thoughts; invention; contrivance.(noun)

  source: webster1913