Meaning of “ppm” in the English Dictionary

"ppm" in American English

See all translations

chemistry abbreviation for parts per million (= a unit for measuring the amount of a substance that is mixed with a liquid or another substance)

(Definition of “ppm” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"ppm" in Business English

See all translations

ppmnoun [ plural ]


abbreviation for parts per million: the amount of a chemical in relation to the substance that contains it:

Lead levels in the water were above 3,500 ppm.

(Definition of “ppm” from the Cambridge Business English Dictionary © Cambridge University Press)