/ Dictionary / Index O operand: Meaning and Definition of Find definitions for: op•er•and Pronunciation: (op'u-rand"), [key] — n. Math. a quantity upon which a mathematical operation is performed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: operand (Thesaurus) opera house operant Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language