notion

noun

1. 1

   Mental apprehension of whatever may be known, thought, or imagined; idea, concept.

2. 2

   A sentiment; an opinion.

3. 3

   Sense; mind.

4. 4

   An invention; an ingenious device; a knickknack.

   “Yankee notions”

5. 5

   Any small article used in sewing and haberdashery, either for attachment to garments or as a tool, such as a button, zipper, or thimble.

6. 6

   Inclination; intention; disposition.

   “I have a notion to do it.”