Mature(adjective) – fully grown or developed.

(NOTE:- when you are talking about people, the usual word is ‘MATURE’  (NOT matured)

• He’s a mature boy of sixteen ( Not matured).
• She’s a mature woman.
• He took a mature decision about the marriage of his daughter.
• He’s not mature enough to get married.
• Nehru was a mature political leader.

Mature(verb)

• He felt that he had grown up and matured very much.
• Boys mature more slowly than girls both physically and psychologically.

Mature(adjective-2)

• The whisky is kept here until it is matured/mature.
• Only mature/matured apples are collected for sale.

NOTE:-  You can use mature OR matured when you are talking about things such as wine, cheese etc  OTHER THAN PEOPLE.