broad outline
rough outline
general outline

The broad outline is that him and me are one person.

If the Republicans are holding the details of their plan close, its broad outline is no secret.

So I sat down and it took me about a week to plan in broad outline all six books.

She went on to describe the broad outline of her strategy.

My comments provide only a broad outline of the Chinese plan.

This proposal provided the broad outline of a Federal government.

Here, in broad outline, are some of the more general and important conclusions.

Still, we could use them to plan a broad outline of our course.

"Then you'd better just give the broad outline and tell him the details when you get to London."

The teacher gave the students a broad outline of his plans for the session.