At best he was in deep thought and might not turn around.

His face was full of some deep thought that I couldn't read.

Coming back to the table he stood for a few minutes in deep thought.

She appeared to be in a state of deep thought.

They mean well, but there is a lack of deep thought in the administration.

But he didn't have time or energy for deep thoughts at the moment.

That was pretty much the deep thought for the afternoon.

After a week spent in deep thought she decided to try the obvious.

Both men sat in deep thought and stared at the dark street.

But not many are thinking deep thoughts now this close to home.