The Collaborative International Dictionary of English v.0.48:

Ripen \Rip"en\, v. i. [imp. & p. p. Ripened;p. pr. & vb. n.
   Ripening.]
   1. To grow ripe; to become mature, as grain, fruit, flowers,
      and the like; as, grapes ripen in the sun.
      [1913 Webster]

   2. To approach or come to perfection.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ripened
    adj 1: of wines, fruit, cheeses; having reached a desired or
           final condition; (`aged' pronounced as one syllable);
           "mature well-aged cheeses" [syn: aged, ripened]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "ripened":
   adult, archetypical, blase, classic, consummate, cosmopolitan,
   cosmopolite, developed, exemplary, experienced, expert, finished,
   full-blown, fully developed, knowing, masterful, masterly, mature,
   matured, mellow, model, not born yesterday, old, perfected,
   polished, practiced, proficient, quintessential, refined, ripe,
   sagacious, seasoned, sophisticated, tried, tried and true, veteran,
   world-wise, worldly, worldly-wise