noun

• (archaic, now dialectal or humorous, possibly offensive) A girl or young woman, especially a buxom or lively one.
  "Jane played the role of a wench in an Elizabethan comedy."
• (archaic, now dialectal or humorous, possibly offensive) A girl or young woman, especially a buxom or lively one.
  "The woman is a brazen, hard-looking wench, a female pedlar, who hawks needles, thread, cheap looking-glasses, pious pictures, almanacs, hair-pins, ballads, of the most humble pattern, through the country."
• (archaic or dialectal) Used as a term of endearment for a female person, especially a wife, daughter, or girlfriend: darling, sweetheart.
  "When I am dead, good Wench, / Let me be vs'd with Honor; ſtrew me ouer / With Maiden Flowers, that all the world may know / I was a chaſte Wife, to my Graue: [...]"
• (archaic) A woman servant; a maidservant.
  "When they had kyndled a fyre in the myddes of the palys / and were sett doune to gedder / Peter alsoo sate doune amonge them. And won off the wenches / as he sate / beholde him by the light and sett goode eyesight on him / and sayde: This same was also with hym. Then he denyed hym sayinge: Woman I knowe hym nott."

verb

• (intransitive, archaic, now humorous) To frequent prostitutes; to whore; also, to womanize.
  "This is ſure ſome hide-bound ſtudent, that proportions his expence by his penſion; and wencheth at Tottenham court for ſtewed prunes and cheeſcakes."
• (intransitive, archaic) To act as a wench.
  "λαικάζω, to wench"