Proficient

(-fish'ent), a. Well advanced in any branch of knowledge or skill; possessed of considerable acquirements; well-skilled; versed.

(-fish'ent), n. [Lat. proficiens, p. pr. of proficere, to go forward, make progress, from pro, forward, and facere, to make; It. & Sp. proficiente.] One who has made considerable advances in any business, art, science, or branch of learning; an expert; an adept; as, a proficient in a trade or occupation; a proficient in mathematics, in anatomy, in music, or the like.