[ nahy-truh-fahy ]
/ ˈnaɪ trəˌfaɪ /

verb (used with object), ni·tri·fied, ni·tri·fy·ing.

to oxidize (ammonia, ammonium compounds, or atmospheric nitrogen) to nitrites, nitrates, or their respective acids, especially by bacterial action.
to impregnate with nitrogen or nitrogen compounds.
to treat or combine with nitrogen or its compounds.
(formerly) to convert into niter.

Origin of nitrify

From the French word nitrifier, dating back to 1820–30. See nitr-, niter, -i-, -fy


ni·tri·fi·a·ble, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for nitrify

British Dictionary definitions for nitrify

/ (ˈnaɪtrɪˌfaɪ) /

verb -fies, -fying or -fied (tr)

to treat or cause to react with nitrogen or a nitrogen compound
to treat (soil) with nitrates
(of nitrobacteria) to convert (ammonium compounds) into nitrates by oxidation

Derived forms of nitrify

nitrifiable, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012