- Liquid waste or sewage discharged into a river or the sea: the bay was contaminated with the effluent from an industrial plantMore example sentences
- Ground water is polluted by industrial effluent and human waste.
- Treated effluent is still discharged into Maguires Creek, the Richmond River and the Pacific Ocean.
- However, there were occasions when because of the poor quality industrial effluents being discharged into the river the water could carry no oxygen and it was impossible for fish to survive.
late Middle English (in the adjective sense 'flowing out'): from Latin effluent- 'flowing out', from the verb effluere (see effluence). The noun dates from the mid 19th century.