na-adjective, noun which may take the genitive case particle 'no', noun
experienced; veteran; skilled; expert
Describes a person with long, seasoned experience and refined skill, often in a profession or craft. Carries a positive, respectful tone.
彼は老練な職人だ。
He is a veteran craftsman.
老練の技が光る作品だ。
It's a work that showcases expert skill.