In modern English, humour (humor in US English) means being amusing or comic (possessing the ability to make people laugh) or being able to appreciate something amusing or comic ("A sense of humour.") As to what makes something amusing or comic, that varies between cultures, age groups and even individuals. A humorist is someone whose profession is making people laugh (usually through writing rather than through public speaking: the latter is usually called a comedian.) The adjective form is humorous.
The older meaning of humour is mood or temper. We still have this usage ("in a good humour.") In the MIddle Ages and even into the 18th century, it was thought that humans were governed by the "humours" or fluids in their blood, which gave them their personalities (this is where phrases like "good-humoured" come from.) It can also be a verb: "to humour someone" means to play along with their moods instead of challenging them.
The word humour comes from the Latin humor, "Moisture."
The older meaning of humour is mood or temper. We still have this usage ("in a good humour.") In the MIddle Ages and even into the 18th century, it was thought that humans were governed by the "humours" or fluids in their blood, which gave them their personalities (this is where phrases like "good-humoured" come from.) It can also be a verb: "to humour someone" means to play along with their moods instead of challenging them.
The word humour comes from the Latin humor, "Moisture."