/ Dictionary / Index O operose: Meaning and Definition of Find definitions for: op•er•ose Pronunciation: (op'u-rōs"), [key] — adj. industrious, as a person. done with or involving much labor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: operose (Thesaurus) operon OPers Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language