Humor (noun)

1. The quality of being amusing or comic, especially as expressed in literature or speech.
2. A mood or state of mind, especially a playful or mischievous one.
3. A type of entertainment, typically consisting of jokes and satire, that is intended to make an audience laugh.

Origin:

Middle english: from old french humour, from latin humor "moisture", later "body fluid", later "mood, temperament".

Examples:

1. He told a few jokes to try to lighten the mood with a little bit of humor.
2. She had a great sense of humor and always made everyone around her laugh.
3. The movie was full of humor and had the audience laughing from beginning to end.
4. The book was written with a dry sense of humor that only the most observant reader would pick up on.
5. The stand-up comedian's humor was edgy and not for everyone, but the crowd loved it.