notion

noun

Etymology: From Latin nōtiō (“a becoming acquainted, a taking cognizance, an examination, an investigation, a conception, idea, notion”), from nōscō (“to know”). Compare French notion. See know.

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

   “What hath been generally agreed on, I content myself to assume under the notion of principles.”

   “1705-1715, George Cheyne, The Philosophical Principles of Religion Natural and Revealed there are few that agree in their Notions about them:.”

2. A sentiment; an opinion.

   “The extravagant notion they entertain of themselves.”

   “December 2, 1832, John Henry Newman, Wilfulness, the Sin of Saul A perverse will easily collects together a system of notions to justify itself in its obliquity.”

3. Sense; mind.

   “Who wrought with them, and all things else that might / To half a soul and to a notion crazed / Say, 'Thus did Banquo.'”

4. An invention; an ingenious device; a knickknack.

   “Yankee notions”

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. Inclination; intention; predisposition; disposition.

   “I have a notion to do it.”

7. Pretentiousness or overambition.