/ Dictionary / Index R respirator: Meaning and Definition of Find definitions for: res•pi•ra•tor Pronunciation: (res'pu-rā"tur), [key] — n. a masklike device, usually of gauze, worn over the mouth, or nose and mouth, to prevent the inhalation of noxious substances or the like. See an apparatus to produce artificial respiration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: respirator (Thesaurus) respiration respiratory Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language