From Longman Dictionary of Contemporary Englishdumpingdump‧ing /ˈdʌmpɪŋ/ noun [uncountable] the act of getting rid of dangerous waste material in a place that is not safe The government has promised to stop dumping by the state-owned chemical plants.
Examples from the Corpus
dumping• The agreement included the arrangement that a local resident should supervise and inspect all dumping operations.• Yet, Greene is emphatic that if there is any illegal dumping, it is negligible.• These results took no account of illegal dumping. 