/ Dictionary / Index O opera seria: Meaning and Definition of Find definitions for: o•pe•ra se•ri•a Pronunciation: (op'ur-u sēr'ē-u, op'ruIt.ô'pe-rä se'ryä), [key] — pl. o•pe•ra se•rias, o•pe•ras se•ria, o•pe•re se•rie Italian dramatic opera of the 18th century based typically on a classical subject and characterized by extensive use of the aria da capo and recitative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. operant conditioning operate 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