The Collaborative International Dictionary of English v.0.48:

Mature \Ma*ture"\, v. t. [imp. & p. p. Matured; p. pr. & vb.
   n. Maturing.] [See Maturate, Mature.]
   To bring or hasten to maturity; to promote ripeness in; to
   ripen; to complete; as, to mature one's plans. --Bacon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

matured \matured\ adj.
   Fully grown.

   Syn: full-blown.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

matured
    adj 1: fully ripe; at the height of bloom; "a full-blown rose"
           [syn: full-blown, matured]
    2: fully considered and perfected; "mature plans" [syn:
       mature, matured]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "matured":
   adult, archetypical, blase, classic, complete, consummate,
   cosmopolitan, cosmopolite, developed, entire, exemplary,
   experienced, expert, finished, full, full-blown, full-fledged,
   full-grown, full-scale, fully developed, global, intact, knowing,
   masterful, masterly, maturated, mature, mellow, model,
   not born yesterday, old, perfected, polished, practiced,
   proficient, quintessential, refined, ripe, ripened, sagacious,
   seasoned, solid, sophisticated, total, tried, tried and true,
   unabbreviated, uncut, undiminished, unexpurgated, veteran, whole,
   world-wise, worldly, worldly-wise