Salt (noun)

1. A white crystalline substance that is used as a seasoning in food and as a preservative.
2. A chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation.

Origin:

Old english sealt, of germanic origin; related to dutch zout and german salz.

Examples:

1. He added salt to the soup.
2. She sprinkled salt on her food.
3. The salt mines have been in operation for centuries.
4. Salt is used to preserve meat and fish.
5. The salt water in the ocean is composed of dissolved salt.