I. adjective
having or manifesting the knowledge, skill, and experience needed for success in a particular field or endeavor
a proficient glider pilot
Synonyms: adept, crack, crackerjack, expert, master, masterful, masterly, skilled, skillful; compare experienced , skillful 2
Related Word: checked-out, drilled, exercised, practiced; effective, effectual, efficient; able, capable, competent, qualified; accomplished, consummate, finished
Contrasted words: ignorant, untaught, untrained; inexperienced; unskilled
Antonyms: incompetent
II. noun
Synonyms: expert , adept, artist, artiste, authority, master, past master, professional, virtuoso, whiz