Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ppm”

ppm

noun [plural]     MEASURES
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 noun from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of ppm

Definitions of “ppm” in other dictionaries

Word of the Day

neighbourly

friendly or helpful

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More