Definition of humour noun from the Oxford Advanced Learner's Dictionary
humour
noun (especially UShumor)
ˈhjuːmə(r) ˈhjuːmər
1[uncountable]the quality in something that makes it funny or amusing; the ability to laugh at things that are amusinga story full of gentle humourShe ignored his feeble attempt at humour.They failed to see the humour of the situation.I can't stand people with no sense of humour.Whatever you do, don't lose your sense of humour.She smiled with a rare flash of humour.She has her very own brand of humour.The film is only funny if you appreciate French humour (= things that cause French people to laugh).2[countable, uncountable] (formal) the state of your feelings or mind at a particular timeto be in the best of humoursThe meeting dissolved in ill humour.to be out of humour(= in a bad mood) see also good humour, good-humoured, ill-humoured3[countable] (old use) one of the four liquids that were thought in the past to be in a person's body and to influence health and character
ˈhjuːmə(r) 
ˈhjuːmər 
1 [uncountable] the quality in something that makes it funny or amusing; the ability to laugh at things that are amusinga story full of gentle humourShe ignored his feeble attempt at humour.They failed to see the humour of the situation.I can't stand people with no sense of humour.Whatever you do, don't lose your sense of humour.She smiled with a rare flash of humour.She has her very own brand of humour.The film is only funny if you appreciate French humour (= things that cause French people to laugh).2 [countable, uncountable] (formal) the state of your feelings or mind at a particular timeto be in the best of humoursThe meeting dissolved in ill humour.to be out of humour (= in a bad mood) see also good humour, good-humoured, ill-humoured3 [countable] (old use) one of the four liquids that were thought in the past to be in a person's body and to influence health and character