noun (n)

• a vague idea in which some confidence is placed(noun.cognition)

  Synonym:
  belief, feeling, impression, opinion
  

  source: wordnet30
• a general inclusive concept(noun.cognition)

  source: wordnet30
• an odd or fanciful or capricious idea(noun.cognition)

  Example:
  The theatrical notion of disguise is associated with disaster in his stories.
  

  Synonym:
  whim, whimsey, whimsy
  

  source: wordnet30
• (usually plural) small personal articles or clothing or sewing items(noun.artifact)

  Example:
  Buttons and needles are notions.
  

  source: wordnet30