a conception of or belief about something

children have different notions about the roles of their parents

I had no notion of what her words meant

the notion that mankind's Golden Age lay in the past

an impulse or desire, especially one of a whimsical kind

she had a notion to ring her friend at work

Gary laughed at yet another one of my misty-eyed notions

items used in sewing, such as buttons, pins, and hooks