ppm

American

Also PPM, P.P.M., p.p.m. parts per million.
pulse per minute.

ppm British

abbreviation

chem parts per million
Also: PPM. peak programme meter

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There, they encountered a drop of sugar solution containing 0, 25 ppm, 250 ppm, or 2,000 ppm of caffeine.

From Science Daily • Apr. 18, 2026

By 2024, average levels had fallen to less than 1 ppm.

From Science Daily • Feb. 7, 2026

Soil testing revealed a high lead level of 110 ppm.

From Los Angeles Times • Aug. 23, 2025

By contrast, the earlier Eocene, when C02 reached 1000 ppm and the global mean temperatures were 13º C warmer than today, could represent the worst case scenario.

From Salon • Feb. 17, 2025

Turbidity is consistently more than 100 ppm in the lower portions of the mainstream and major tributaries, but is usually lower in the upper portions of tributaries.

From Fishes of the Wakarusa River in Kansas by Deacon, James E.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023