humour

noun

1.
a characteristic (habitual or relatively temporary) state of feeling
Derived from:
humour
2.
a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
3.
(Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state
6.
the trait of appreciating (and being able to express) the humorous