concentrations
- 1Plural of concentration.
Researchers tracked pollutant concentrations along the river over six months.
The soldiers reported heavy troop concentrations massing near the border.
Note
A plural that exists only where the noun can be counted. Concentration is usually a mass noun, naming the act of focusing attention or the process of reducing a liquid, and those senses rarely take an -s. The plural appears when separate instances are meant: measured proportions of a substance (pollutant concentrations, high concentrations of salt) or the fields a university student focuses on. Mental focus stays singular: deep concentration, not concentrations.
concentrations is a form of concentration
concentration, noun: The focusing of one's attention on a specific object or activity. Full entry
- Forms
- concentrationconcentrations plural
- Spelling
- concentration → concentrations: add -s
- Sound
- The ending sounds like /z/.
Use it in a sentence
Write your own sentence with concentrations, and AI will tell you whether it fits and which meaning you used.