notion
n. countablen. a belief, idea, or opinion about something. It is often used when you are talking about an idea that might be a bit vague or not fully proven.
n. a belief or understanding of something; a mental representation of a concept. Often implies a subjective or speculative idea rather than a concrete fact.
I have no notion of what he is talking about.
The traditional notion that a college degree guarantees a high-paying job is being questioned by many young people today.
The author challenges the romanticised notion of rural life, presenting instead a gritty and realistic portrayal of the hardships faced by farming communities in the nineteenth century.
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.
Commonly followed by the preposition 'of' or a 'that' clause.