NITRIFY Meaning of NITRIFY in English [ 'nʌɪtrɪfʌɪ ]■ verb ( nitrifies , ~ing , nitrified ) Chemistry convert (ammonia or another nitrogen compound) into nitrites or nitrates.Derivativesnitrification noun Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004