1. a person, organization, or thing that contaminates the environment with harmful substances

Examples

• The factory was identified as the main polluter of the river.
• Environmental groups are demanding stricter penalties for polluters.
• The oil company became a major polluter after the spill.
• New regulations target the worst polluters in the city.
• Citizens protested against the industrial polluter in their neighborhood.
• The government fined the polluter millions of dollars for environmental damage.