Noun notion has 4 senses
  1. impression, feeling, belief, notion, opinion - a vague idea in which some confidence is placed; "his impression of her was favorable"; "what are your feelings about the crisis?"; "it strengthened my belief in his sincerity"; "I had a feeling that she was lying"
    --1 is a kind of idea, thought
    --1 has particulars:
     presence; effect; first blush; intuition, hunch, suspicion
  2. notion - a general inclusive concept
    --2 is a kind of
    concept, conception, construct
    --2 has particulars: mumpsimus
  3. notion, whim, whimsy, whimsey - an odd or fanciful or capricious idea; "the theatrical notion of disguise is associated with disaster in his stories"; "he had a whimsy about flying to the moon"; "whimsy can be humorous to someone with time to enjoy it"
    --3 is a kind of idea, thought
  4. notion - (usually plural) small personal articles or clothing or sewing items; "buttons and needles are notions"
    --4 is a kind of
    article
    --4 has particulars: ribbon
,
TOP