Source : Webster's Revised Unabridged Dictionary (1913)

Wench \Wench\, v. i. [imp. & p. p. {Wenched}; p. pr. & vb. n.
   {Wenching}.]
   To frequent the company of wenches, or women of ill fame.

Wench \Wench\, n. [OE. wenche, for older wenchel a child,
   originally, weak, tottering; cf. AS. wencle a maid, a
   daughter, wencel a pupil, orphan, wincel, winclu, children,
   offspring, wencel weak, wancol unstable, OHG. wanchol;
   perhaps akin to E. wink. See {Wink}.]
   1. A young woman; a girl; a maiden. --Shak.

            Lord and lady, groom and wench.       --Chaucer.

            That they may send again My most sweet wench, and
            gifts to boot.                        --Chapman.

            He was received by the daughter of the house, a
            pretty, buxom, blue-eyed little wench. --W. Black.

   2. A low, vicious young woman; a drab; a strumpet.

            She shall be called his wench or his leman.
                                                  --Chaucer.

            It is not a digression to talk of bawds in a
            discourse upon wenches.               --Spectator.

   3. A colored woman; a negress. [U. S.]

Source : WordNet®

wench
     n : informal terms for a (young) woman [syn: {dame}, {doll}, {skirt},
          {chick}, {bird}]
     v : frequent prostitutes