/ Dictionary / Index O orifice: Meaning and Definition of Find definitions for: or•i•fice Pronunciation: (ôr'u-fis, or'-), [key] — n. an opening or aperture, as of a tube or pipe; a mouthlike opening or hole; mouth; vent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orifice (Thesaurus) Orient Express oriflamme Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language