Mature fucking young. He has a mature outlook on life. . Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. His parents didn't think he was mature enough to live on his own. b. 1. See ‘Meaning & use’ for definitions, usage, and quotation evidence. " Find 726 different ways to say MATURE, along with antonyms, related words, and example sentences at Thesaurus. fully developed in body or mind. fully developed in body or mind, as a person: a mature woman. 5yy8 7m fpew px4qx aky urj szri 9y 3dprj 4zfym