/ Dictionary / Index I instrumentalist: Meaning and Definition of Find definitions for: in•stru•men•tal•ist Pronunciation: (in"stru-men'tl-ist), [key] — n. a person who plays a musical instrument. an advocate of instrumentalism. —adj. of, pertaining to, or advocating instrumentalism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instrumentalist (Thesaurus) instrumentalism instrumentality Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language