someone who uses salt to preserve meat or fish or other foods
"The old salter carefully rubbed coarse salt over every piece of herring before storing them in the cool cellar for winter."
someone who makes or deals in salt
"The local salter sold blocks of rock salt to the nearby fish curing plants every winter."
One who makes, sells, or applies salt.
"The old salter carefully spread fresh crystals across the icy driveway before dawn."
An occupational surname, from occupations.
"The genealogist explained that Salter was a common occupational surname derived from someone who worked as a salar or salt maker in the medieval period."