Definition of nitrify in US English:

nitrify

verb

[with object]Chemistry
  • Convert (ammonia or another nitrogen compound) into nitrites or nitrates.

    ‘a considerable amount of the ammonia so formed is nitrified’

Origin

Early 19th century: from French nitrifier.

Pronunciation

nitrify

/ˈnītrəˌfī//ˈnaɪtrəˌfaɪ/