Then he looked up at the people on the bank.

He looked up at her on the bank above him.

"Have you ever looked up at a full moon on a hot summer night?"

I can look it up on the computer for you.

Sites are good for looking up information on the computer.

She looked up at him, a small smile on her face.

Her eyes looked up at him, this time open wide on his face.

Did you look him up on your way out of the library?

He looked up at the feel of a hand on his shoulder.

She looked up at me with a patient look on her face.