/pəˈlu:ʃn ||; pəˈluʃən/noun[U] 1 the action of making the air, water, etc dirty and dangerous 污染: Major steps are being taken to control the pollution of beaches. 现正采取重要措施来控制海滩污染。
2 substances that pollute 污染物质: The rivers are full of pollution. 江河里充满污染物质。