-üshən noun
( -s )
Etymology: Middle English pollucioun emission of semen at other times than in coition, defilement, uncleanness, from Middle French & Late Latin; Middle French pollution, from Late Latin pollution-, pollutio defilement, uncleanness, from Latin pollutus (past participle of polluere to pollute) + -ion-, -io -ion
1. : emission of semen at other times than in coition
2. : the action of polluting or the state of being polluted : defilement , desecration , impurity , uncleanness
streams subject to pollution by … mill wastes — C.R.Cox
the dilution of atmospheric pollution — K.H.Jehm
cleanse the king and the people from the pollution of any offenses — J.G.Frazer
3. : crossbreeding when regarded as the source of degeneration of a stock