He returned to his former gravity, but the mood in the room had lightened just a little; they all felt it.

His mood had lightened considerably with freedom and present company.

She sensed his mood lighten again, although he didn't answer.

Yet the mood lightened and built as the race went on.

His mood lightened again: Food would be just the thing.

But when I looked into the waiting room my mood lightened immediately.

Later in the day we returned to her room and the mood lightened considerably.

The mood lightened, the rest of the presents were opened, and the party settled down in!

On the court for the morning shootaround, the mood lightened.

But once everyone was in the auditorium, the mood lightened as it had the night before.