The plan that had been a vague idea in my head suddenly became real.

You have only a vague idea of what the sky is, having never seen it.

In one sense, the big society is an idea so vague almost nobody could be against it.

But now he had a vague idea what they meant.

"Where would we be in our business without vague ideas?"

They give you some vague idea of which way to go.

She had a vague idea that it was hot there.

A vague idea worked in the back of his mind, but wouldn't come clear.

I had a vague idea where it was, but no more.

Very young children only have a vague idea of what it means to die.

This is because the public has only the foggiest notion of what's on the table.

The only trouble was, he hadn't the foggiest notion how to do that.

She hadn't the foggiest notion of what he was there to do.

I've spent a month in that place, and I don't have the foggiest notion what has happened out here.

And I don't have the foggiest notion who he is!

I've found that about half your second generation here has only the foggiest notion of the past.

In fact, we don't have the foggiest notion what men really love about women's bodies.

But he had not the foggiest notion as to the meaning of the word.

And I haven't the foggiest notion of what to do with him.

I really don't have the foggiest notion what to do with her.