Definition of humor:
a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
the trait of appreciating (and being able to express) the humorous; "she didn't appreciate my humor"; "you can't survive in the army without a sense of humor"
a characteristic (habitual or relatively temporary) state of feeling; "whether he praised or cursed me depended on his temper at the time"; "he was in a bad humor"
the quality of being funny; "I fail to see the humor in it"
(Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state; "the humors are blood and phlegm and yellow and black bile"
the liquid parts of the body
put into a good mood