Definition of nitrification

• n. - The act, process, or result of combining with nitrogen or some of its compounds.
• n. - The act or process of oxidizing nitrogen or its compounds so as to form nitrous or nitric acid.
• n. - A process of oxidation, in which nitrogenous vegetable and animal matter in the presence of air, moisture, and some basic substances, as lime or alkali carbonate, is converted into nitrates.