notion
/ˈnəʊʃ(ə)n/noun
An idea or opinion about something, often one that is not fully formed.
Example sentences
- “She has some strange notions about what makes a healthy diet.”
- “He had no notion of how expensive the city would be.”
Slightly dismissive of the idea's seriousness. In American shops, 'notions' oddly also means small sewing supplies like buttons and thread.