\Sew"er\, n.
1. One who sews, or stitches.
2. (Zo["o]l.) A small tortricid moth whose larva sews
   together the edges of a leaf by means of silk; as, the
   apple-leaf sewer ({Phoxopteris nubeculana})

\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.

\Sew"er\, n. [Cf. OE. assewer, and asseour, OF. asseour,
F. asseoir to seat, to set, L. assidere to sit by; ad +
sedere to sit (cf. {Sit}); or cf. OE. sew pottage, sauce,
boiled meat, AS. se['a]w juice, Skr. su to press out.]
Formerly, an upper servant, or household officer, who set on
and removed the dishes at a feast, and who also brought water
for the hands of the guests.
      Then the sewer Poured water from a great and golden
      ewer, That from their hands to a silver caldron ran.
                                               --Chapman.