mature
adjective /məˈtʃʊə(r)/,  /məˈtjʊə(r)/
  /məˈtʃʊr/,  /məˈtʊr/
maturer is occasionally used instead of more matureIdioms - (of a child or young person) behaving in a sensible way, like an adult
- Jane is very mature for her age.
 - a mature and sensible attitude
 - She tries to look mature and sophisticated.
 
Oxford Collocations Dictionaryverbs- be
 - become
 - look
 - …
 
- extremely
 - fairly
 - very
 - …
 
 - (of a person, a tree, a bird or an animal) fully grown and developed
- sexually mature
 - a mature oak/eagle/elephant
 
Synonyms oldoldTopics Life stagesc1- elderly
 - aged
 - long-lived
 - mature
 
- old having lived for a long time; no longer young:
- She’s getting old—she’s 75 next year.
 
 - elderly (rather formal) used as a polite word for ‘old’:
- She is very busy caring for two elderly relatives.
 
 - aged (formal) very old:
- Having aged relatives to stay in your house can be quite stressful.
 
 - long-lived having a long life; lasting for a long time:
- Everyone in my family is exceptionally long-lived.
 
 - mature used as a polite or humorous way of saying that somebody is no longer young:
- clothes for the mature woman
 
 
- a(n) old/elderly/aged/long-lived/mature man/woman
 - a(n) old/elderly/aged/mature gentleman/lady/couple
 
Oxford Collocations Dictionaryverbs- be
 - become
 - look
 - …
 
- extremely
 - fairly
 - very
 - …
 
 - developed over a period of time to produce a strong, rich tasteTopics Cooking and eatingc2
 - used as a polite or humorous way of saying that somebody is no longer young
- clothes for the mature woman
 - a man of mature years
 
 - created late in an artist’s life and showing great understanding and skill
 - (business) ready to be paid
 
sensible
fully grown
wine/cheese
no longer young
work of art
insurance policy
Word Originlate Middle English: from Latin maturus ‘timely, ripe’; perhaps related to matins.
Idioms 
on mature reflection/consideration 
- (formal) after thinking about something carefully and for a long time