Love was a silly, romantic notion that had no place in his life.
You humans, for example, have the silly notion that they're cities.
I have this silly notion about English good looks.
Where did you get this silly notion that I like it?
To them, the "big society" is a silly notion, made up by people in London.
He thought about going after her, but knew it was a silly notion.
He walked off down the road muttering under his breath about women and their silly notions.
Get this silly notion out of your head before it's too late.
I had the silly notion there might be some problem.
But don't get any silly notions in your head.