humour US, humor [ˈhjuːmə]
n
1. the quality of being funny
2. Also called sense of humour the ability to appreciate or express that which is humorous
3. situations, speech, or writings that are thought to be humorous
4.
a.  a state of mind; temper; mood
b.  (in combination) ill humour good humour
5. temperament or disposition
6. a caprice or whim
7. (Life Sciences & Allied Applications / Physiology) any of various fluids in the body, esp the aqueous humour and vitreous humour
8. (Life Sciences & Allied Applications / Physiology) Also called cardinal humour Archaic any of the four bodily fluids (blood, phlegm, choler or yellow bile, melancholy or black bile) formerly thought to determine emotional and physical disposition
out of humour in a bad mood
vb (tr)
1. to attempt to gratify; indulge he humoured the boy's whims
2. to adapt oneself to to humour someone's fantasies
[from Latin humor liquid; related to Latin ūmēre to be wet, Old Norse vökr moist, Greek hugros wet]
humourful  US, humorful adj
humourless  US, humorless adj
humourlessness  US, humorlessness n