look

verb

1. To try to see, to pay attention to with one’s eyes.

   “They kept looking at me.”

2. As an intransitive verb, often with “at”.

   “They kept looking at me.”

3. As a transitive verb, often in the imperative; chiefly takes relative clause as direct object.

   “Look what you did to him!”

interjection

1. Pay attention.

   “Look, I'm going to explain what to do, so you have to listen closely.”

noun

1. The action of looking; an attempt to see.

   “Let’s have a look under the hood of the car.”

2. Physical appearance, visual impression.

   “She got her mother’s looks.”

3. A facial expression.

   “He gave me a dirty look.”