/ Dictionary / Index O operatory: Meaning and Definition of Find definitions for: op•er•a•to•ry Pronunciation: (op'ur-u-tôr"ē, -tōr"ē), [key] — n., pl. adj. -ries, —n. a room or other area with special equipment and facilities, as for dental surgery, scientific experiments, or the like. —adj. operative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. operator opera window Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language