/ Dictionary / Index P proficient: Meaning and Definition of Find definitions for: pro•fi•cient Pronunciation: (pru-fish'unt), [key] — adj. well-advanced or competent in any art, science, or subject; skilled: a proficient swimmer. —n. an expert. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: proficient (Thesaurus) proficiency badge profile Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language