0 past simple and past participle of look
2 to try to find something or someone:
I'm looking for my keys.
I looked everywhere, but I couldn't find my glasses.
Have you looked in the dictionary?
4 to face a particular direction:
5 used when you are telling someone to be careful or to pay attention:
[ + question word ] Look where you're going!
Look at the time - we're late!
6 to be planning to do something:
She heard a sudden noise behind her, and swung round to look behind her.
She ambled down the street, stopping occasionally to look in the shop windows.
He slid the letter into his pocket while no one was looking.