What is the meaning of seasoned?

verb

• Lend flavor to.
  • usage: "Season the chicken breast after roasting it"
  • synonyms: season, flavor, flavour
• Make fit.
  • usage: "This trip will season even the hardiest traveller"
  • synonyms: season, harden
• Make more temperate, acceptable, or suitable by adding something else; moderate.
  • usage: "she tempered her criticism"
  • synonyms: temper, season, mollify

adjective

• Aged or processed.
  • usage: "seasoned wood"
• Rendered competent through trial and experience.
  • usage: "a seasoned traveler"; "veteran steadiness"; "a veteran officer"
  • synonyms: veteran