/ Dictionary / Index O operant conditioning: Meaning and Definition of Find definitions for: op'erant condi'tioning Pronunciation: [key] conditioning (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. operant opera seria Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language