0 past simple and past participle of laugh
1 to smile while making sounds with your voice that show you think something is funny or you are happy:
Please don't laugh - I'm being serious.
I could see Emma trying not to laugh and of course that started me off.
In their view, classes that laughed readily ranked highly in terms of cohesion, while classes in which students were reluctant to laugh rated poorly.
We argued a bit and laughed a lot and the fire of his writing and character warmed my heart.
English which would not be laughed at in any part of the country.