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]