A wench is a term that has evolved over time and has had different meanings. Here are some of the definitions and explanations from the search results:

• A young woman or girl, especially one who is a servant or of a socially low class.
• A lewd or promiscuous woman, or a female prostitute.
• A girl or young woman, especially a buxom or lively one, used facetiously.

The term "wench" used to mean "young girl" in Middle English, and over time, it came to mean mainly serving girls, as in a bar wench who serves drinks at a tavern. Eventually, it came to mean prostitute. The term is now considered archaic and possibly offensive.