His science officer turned, forehead ridges damp with sweat, his expression intensely serious.

Not so much arro- gant as intensely serious, they conducted themselves to the full implications of their caste.

What begins as a hobby for the pensioners becomes intensely serious.

The smile never left his face, but his eyes became hard and intensely serious.

They were in a hurry to get going, and they were intensely serious about their studies.

His beer-ad image aside, Madden is intensely serious about his job.

"Of course it doesn't much matter to you, but to me it's so serious, so intensely serious."

When his tired eyelids gave a slight lift, it meant that Sue was intensely serious.

I smiled and hesitated, suspecting a joke, but he was intensely serious about this moniker.

Mr. Kennan was often a gloomy, sensitive and intensely serious man.