Humor refers to the quality of being amusing, comical, funny. It commonly describes a mood, especially a bad mood; a temporary state of mind or disposition brought upon by an event; an abrupt illogical inclination or whim, any of the fluids in an animal body, especially the four "cardinal humours" of blood, yellow bile, black bile and phlegm that were believed to control the health and mood of the human body, and either of the two regions of liquid within the eyeball, the aqueous humour and vitreous humour, which gives the term a broader and more practical sense than a single short definition would suggest. Depending on context, it can also point to moist vapour, moisture and to pacify by indulging, so the category can cover literal uses, related ideas, and more figurative extensions of the same core meaning. Taken together, these meanings present Humor as a flexible theme rather than a narrowly technical label, covering the central idea people usually mean when they use the word while still leaving room for closely related senses that appear in real language. Humor therefore works well as a quotation category because it can hold direct statements about the subject, figurative uses that borrow its meaning, and broader reflections that stay anchored to the same central idea.
