Complete in natural growth or development, as plant and animal forms. See examples of mature used in a sentence. The meaning of mature is having completed natural growth and development :

Mature refers to someone or something that is fully developed physically, emotionally, mentally or in any other aspect. This often entails grown-up behavior, thinking or characteristics and suggests a certain … If you describe someone as mature, you think that they are fully developed and balanced in their personality and emotional behaviour. Mature people behave like adults in a way that shows they are well developed emotionally: Learn more. There are 21 meanings listed in oed's entry for the word mature, three of which are labelled obsolete. See ‘meaning & use’ for definitions, usage, and quotation evidence.

Learn more. There are 21 meanings listed in oed's entry for the word mature, three of which are labelled obsolete. See ‘meaning & use’ for definitions, usage, and quotation evidence. Having or showing characteristics, such as patience and prudence, considered typical of well-balanced adulthood.