Mature is the adjectival form of maturity, as immature is the adjectival form of immaturity, which have several meanings.
Mature or immature may also refer to:
Mature, a character from The King of Fighters series"Mature 17+", a rating in the Entertainment Software Rating Board video game rating systemVictor Mature (1913-1999), American actorImmature (band), an American boy band reference