pollution
//pəˈluːʃən//
Noun
pollutionSingular
pollutionsPlural
1
The presence or introduction of harmful substances or contaminants into the natural environment, causing damage or adverse effects.
Air pollution from factories is a serious problem in many cities.
2
The act or process of polluting or the state of being polluted.
The pollution of the river by factory waste has become a serious problem.
3
Substances that contaminate or make something impure.
The factory released pollution into the river.