/ Dictionary / Index N nitrification: Meaning and Definition of Find definitions for: ni•tri•fi•ca•tion Pronunciation: (nī"tru-fi-kā'shun), [key] — n. the act of nitrifying. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nitrification (Thesaurus) nitriding steel nitrifier Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language