With a vacant expression the boy shook his head.

The man nodded slowly, but it was hard to tell from the vacant expression on his face if he heard or not.

I must have had that vacant expression on my face again, because she reverted to her kindergarten teacher voice.

There was a peaceful, vacant expression on his face.

She was staring across the table at Harry's empty chair, a vacant expression on her face.

He wore the vacant expression they'd almost got used to.

She ate lazily, a pleasant, rather vacant expression on her face.

However, just behind the vacant expression he offered me, I detected fear.

He wandered away with a vacant expression, moving more or less toward the teeter-totters.

Blankly at first, he could tell by the vacant expression of its eyes.