Humor

noun

1. The quality that makes something laughable or amusing; funniness.

   "could not see the humor of the situation."

2. That which is intended to induce laughter or amusement.

   "a writer skilled at crafting humor."

3. The ability to perceive, enjoy, or express what is amusing, comical, incongruous, or absurd.
4. One of the four fluids of the body, blood, phlegm, choler, and black bile, whose relative proportions were thought in ancient and medieval physiology to determine a person's disposition and general health.