CEFR B2

ppm

noun

Meaning

A unit of measurement representing one part of a substance for every million parts of another substance, often used to express very low concentrations.

Examples

The water sample contained only 2 ppm of lead.
Carbon monoxide levels in the room were dangerously high, reaching 100 ppm.

Synonyms: parts per million, parts per thousand, parts per billion, per million

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ppm (B2)

noun

Pronunciation: /ˌpiː piː ˈɛm/

Definition

A unit of measurement representing one part of a substance for every million parts of another substance, often used to express very low concentrations.

Examples

The water sample contained only 2 ppm of lead.
Carbon monoxide levels in the room were dangerously high, reaching 100 ppm.

How to Use ppm

parts per million (collocation): The full phrase for the unit of measurement. — "The solution had a concentration of 50 parts per million."
measured in ppm (prepositional phrase): To express a quantity using the unit parts per million. — "The toxicity of the chemical is measured in ppm."

Synonyms of ppm

Words with a similar meaning to ppm:

Antonyms of ppm

Words with the opposite meaning to ppm:

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