To laugh is to react to something that is funny. Short bursts of air and sound from the mouth indicate that a person is having a good time. Laughter may be controlled but sometimes it is difficult to stop. Some laughter hurts a person’s feelings.
Nadine laughed at Bill’s joke.
She laughs all the time.
Everyone laughed at Sam’s new haircut.
I couldn’t stop laughing during the movie. It was so funny.
Don’t laugh when you see my car. It’s really junky.
People laughing and singing in the apartment next door kept everyone awake all night.
You can use the words "laugh," "laughing," or "laughter" as nouns:
We had a good laugh over the incident.
Laughter could be heard coming from the classroom.
The laughing stopped as soon as one of the children got hurt. Then all we heard was crying.
The city says it will finally fix the problem. That’s a laugh. I’ll believe when I see it. ( That’s a laugh = The situation isn’t good. People made a mistake which may or may not be fixed.)