/ Dictionary / Index I instrumental conditioning: Meaning and Definition of Find definitions for: instrumen'tal condi'tioning Pronunciation: [key] — Psychol. Psychol. conditioning (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. instrumental instrumentalism Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language