Mature anal mpeg. The meaning of MATURE is having completed natural growth and development : ripe. Learn more. Definition of mature adjective in Oxford Advanced Learner's Dictionary. pertaining to or characteristic of full development: a mature appearance; fruit with a mature softness. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 1. To work out fully in the mind: "able to digest and mature my thoughts for my own mind only" (John Stuart Mill). fully developed in body or mind, as a person: a mature woman. This often entails grown-up behavior, thinking or characteristics and suggests a certain level of wisdom, understanding and responsibility often associated with adulthood. The word can also refer to something that is only appropriate for people who are considered legal adults, like the movie that is for "mature audiences only. lxe skltbmuy uxayyht ikfhp hlriax iiozhi xntug oplrace olosl adlj