1Convert (ammonia or another nitrogen compound) into nitrites or nitrates.
2Impregnate with nitrogen or nitrogen compounds.
- ‘The Refuge volunteer collected soil samples from our continuing study on the effects of applying sawdust to restored areas that have been previously nitrified by yellow bush lupine.’
Early 19th century: from French nitrifier.
We take a look at several popular, though confusing, punctuation marks.