Definition of humor noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. The meaning of HUMOR is that quality which appeals to a sense of the ludicrous or absurdly incongruous : a funny or amusing quality. How to use humor in a sentence. Explore the complete meaning of "humour" with expert definitions, real-world usage examples, synonyms, antonyms, and visual aids. Perfect for students, writers, and language learners. There are 15 meanings listed in OED's entry for the noun humour, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.