/ Dictionary / Index D denitrate: Meaning and Definition of Find definitions for: de•ni•trate Pronunciation: (dē-nī'trāt), [key] — -trat•ed, -trat•ing. to free from nitric acid or nitrates; remove oxides of nitrogen from. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Denison denitrify Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language