notion
/ˈnəʊʃən/noun
1
- a conception of or belief about something概念; 观念; 看法, 见解：
children have different notions about the roles of their parents.
孩子们对自己父母的职责有不同的看法。
1.1
- a vague awareness or understanding of the nature of something（模糊的）感知; （不清楚的）概念：
I had no notion of what her words meant.
我不理解她的话是什么意思。
2
- an impulse or desire, especially one of a whimsical kind一时的念头; 突发的奇想：
she had a notion to ring her friend at work.
她忽发奇想, 要给正在上班的朋友打个电话。
3
notions
chiefly N. Amer. items used in sewing, such as buttons, pins, and hooks〈主北美〉（纽扣、针、钩等缝纫用的）小件物品。
词源
late Middle English: from Latin notio（n-） idea， from notus 'known'， past participle of noscere.