To add salt to.

“to salt fish, beef, or pork; to salt the city streets in the winter”

To deposit salt as a saline solution.

“The brine begins to salt.”

To fill with salt between the timbers and planks, as a ship, for the preservation of the timber.

To which salt has been added.

“salted peanuts”

Of an animal, vaccinated against or having recovered from a disease.