Source : Webster's Revised Unabridged Dictionary (1913)

Season \Sea"son\, v. t. [imp. & p. p. {Seasoned}; p. pr. & vb.
   n. {Seasoning}.]
   1. To render suitable or appropriate; to prepare; to fit.

            He is fit and seasoned for his passage. --Shak.

   2. To fit for any use by time or habit; to habituate; to
      accustom; to inure; to ripen; to mature; as, to season one
      to a climate.

   3. Hence, to prepare by drying or hardening, or removal of
      natural juices; as, to season timber.

   4. To fit for taste; to render palatable; to give zest or
      relish to; to spice; as, to season food.

   5. Hence, to fit for enjoyment; to render agrecable.

            You season still with sports your serious hours.
                                                  --Dryden.

            The proper use of wit is to season conversation.
                                                  --Tillotson.

   6. To qualify by admixture; to moderate; to temper. ``When
      mercy seasons justice.'' --Shak.

   7. To imbue; to tinge or taint. ``Who by his tutor being
      seasoned with the love of the truth.'' --Fuller.

            Season their younger years with prudent and pious
            principles.                           --Jer. Taylor.

   8. To copulate with; to impregnate. [R.] --Holland.

Source : WordNet®

seasoned
     adj 1: aged or processed; "seasoned wood" [ant: {unseasoned}]
     2: having been given flavor (as by seasoning) [syn: {flavored},
         {flavoured}]
     3: rendered competent through trial and experience; "troops
        seasoned in combat"; "a seasoned traveler"; "veteran
        steadiness"; "a veteran officer" [syn: {veteran(a)}]