notion

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:.

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.

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.'

An invention; an ingenious device; a knickknack.

Yankee notions

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