idea; a vague idea in which some confidence is placed
Notion in a sentence
She had the notion that he was lying.
Synonyms for notion
idea
concept
thought
Antonyms for notion
certainty
fact
knowledge
Practice notion on real SAT questions
Vocabulary like notion appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.