/ Dictionary / Index O operationalism: Meaning and Definition of Find definitions for: op•er•a•tion•al•ism Pronunciation: (op"u-rā'shu-nl-iz"um), [key] — n. Philos. the doctrine that the meaning of a scientific term, concept, or proposition consists of the operation or operations performed in defining or demonstrating it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: operationalism (Thesaurus) operational calculus operations income Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language