Definition of Notion

Noun: notion now-shun

A vague idea in which some confidence is placed
"his notion of her was favourable";
- impression, feeling, belief, opinion
A general inclusive concept
An odd, fanciful or capricious idea
"the theatrical notion of disguise is associated with disaster in his stories";
- whim, whimsy, whimsey
(usually plural) small personal articles, clothing or sewing items
"buttons and needles are notions"