ppm
American-
Also PPM, P.P.M., p.p.m. parts per million.
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pulse per minute.
abbreviation
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chem parts per million
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Also: PPM. peak programme meter
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.
"We saw that the shirts we tested were all over the allowed limit for lead of 100 ppm," says Espinoza.
From Science Daily • Apr. 2, 2026
Soil testing revealed a high lead level of 110 ppm.
From Los Angeles Times • Aug. 23, 2025
The residents wanted to grow food, he said, but the soil had lead levels around 112 ppm, well over the state limit.
From Los Angeles Times • Apr. 24, 2025
As of 2024, the carbon dioxide concentration in Earth’s atmosphere was 424.6 ppm, a jump of more than 50% from levels before our species began relying on fossil fuels less than three centuries earlier.
From Salon • Feb. 6, 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
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
