What does Lac mean in English?

"Lac" is not a common English word. It could be a shortened version of several things, or a word from another language.

Here are some possibilities:

* Lacquer: A protective coating for surfaces, usually shiny and hard.

* Lacrosse: A team sport played with a stick and ball.

* Lactic acid: A chemical compound produced in the muscles during exercise.

* Lake: A large body of water surrounded by land.

If you provide more context, I can give you a more specific answer. For example, what is the sentence or situation where you encountered the word "lac"?