/ ˈsuːɪdʒ; NAmE ; BrE also ˈsjuː-/ noun
[ U ] used water and waste substances that are produced by human bodies, that are carried away from houses and factories through special pipes (= sewers ) :
a ban on the dumping of raw sewage (= that has not been treated with chemicals) at sea
sewage disposal
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WORD ORIGIN
mid 19th cent.: from sewer , by substitution of the suffix -age .