NOTION

n. 1 idea, thought, concept, conception, image, impression, general idea, (mental) picture, inkling She has a pretty good notion of who did it I haven't the slightest notion of what you are talking about. 2 fancy, whim, crotchet, whimsy, caprice, impulse, inclination, vagary, conceit, quirk, kink She suddenly took a notion to fly to New York and left