noun (n)

• the content of cognition; the main thing you are thinking about(noun.cognition)

  Example:
  The thought never entered my mind.
  

  Synonym:
  idea
  

  source: wordnet30
• the process of using your mind to consider something carefully(noun.cognition)

  Example:
  She paused for thought.
  

  Synonym:
  cerebration, intellection, mentation, thinking, thought process
  

  source: wordnet30
• the organized beliefs of a period or group or individual(noun.cognition)

  Example:
  19th century thought.
  Darwinian thought.
  

  source: wordnet30
• a personal belief or judgment that is not founded on proof or certainty(noun.cognition)

  Example:
  What are your thoughts on Haiti?.
  

  Synonym:
  opinion, persuasion, sentiment, view
  

  source: wordnet30
• The act of thinking; the exercise of the mind in any of its higher forms; reflection; cogitation.(noun)

  source: webster1913