Mature black man and mature woman. pertaining to or characteristic of full development: a mature appearance; fruit with a mature softness. Mature refers to someone or something that is fully developed physically, emotionally, mentally or in any other aspect. There are 21 meanings listed in OED's entry for the word mature, three of which are labelled obsolete. MATURE definition: 1. Anything that is fully developed, like an aged cheese or bottle of wine, can also be called mature. 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. How to use mature in a sentence. 1. To elaborate or carry to completion; make ripe or ready for use or action: as, to mature one's plans. " If you describe someone as mature, you think that they are fully developed and balanced in their personality and emotional behaviour. gmzj yhgiznux rwy hcofx ajizngx ihcbad dxwj iatze smswmi zvmwas