notion
Notion is a general term for an idea, concept, belief, or understanding about something. In everyday language, it refers to a person’s mental grasp or impression of a topic, as in a notion of fairness. In philosophy and cognitive science, notions or concepts are studied as mental representations that categorize experiences and guide reasoning. The word derives from Old French notion, ultimately from Latin notio, meaning knowledge or understanding.
Notion is also the name of a cloud-based productivity platform designed as an all-in-one workspace for notes,