SEWER (2)

Sew″er (?), n. [[OF. sewiere, seuwiere, ultimately fr. L. ex out + a derivative of aqua water; cf. OF. essevour a drain, essever, esseuwer, essiaver, to cause to flow, to drain, to flow, LL. exaquatorium a channel through which water runs off. Cf. Ewer, Aquarium.]] A drain or passage to carry off water and filth under ground; a subterraneous channel, particularly in cities.