- The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects: the level of pollution in the air is risingMore example sentences
- Insidious pollution of the soil is the main cause of extinction of plant species in the UK.
- People move or reduce physical activities when air pollution becomes intolerable.
- This is a wasteful process causing a net loss of nitrogen to the animal and pollution of the environment.
late Middle English: from Latin pollutio(n-), from the verb polluere (see pollute).