laugh-n; 4 Senses

Sense Number 1: the act of chuckling, laughing

Commentary: LAUGH[+event][+utterance][+chuckle]

Examples:
The comedian's joke got a few laughs from the audience.
A maniacal laugh issued forth now and again from the attic of the old house.
The child ignored the laughs of his classmates and continued his piano solo.
Santa Claus gave a big belly laugh as he put presents under the tree.

Mappings:
PropBank: laugh.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: a manner of facial expression, a smile

Commentary: LAUGH[+quality][+manner][+expression][+facial][+smile]

Examples:
The lips on the Venetian mask were curled into a laugh.
The clown mimed a silent laugh as he performed for the children.

Mappings:
PropBank: NM
WordNet 3.0 Sense Numbers: 2

Sense Number 3: a source or cause of derision

Commentary: LAUGH[+role][+source][+of_derision]

Examples:
So John claims he invented the Internet? That's a laugh!
It's such a laugh that, after all her vicious gossiping, she's now the center of that scandal.

Mappings:
PropBank: NM
WordNet 0.0 Sense Numbers: 2

Sense Number 4: an amusement, something fun

Commentary: LAUGH[+event][+amusement]

Examples:
We had a lot of laughs together in college.
She decided to play along with him for a laugh.
The movie is a laugh a minute.

Mappings:
PropBank: NM
WordNet 3.0 Sense Numbers: 3