- sodium chloride, NaCl, a white, crystalline substance with a characteristic taste, found in natural beds, in sea water, etc., and used for seasoning and preserving foods, etc.
- a chemical compound derived from an acid by replacing hydrogen, wholly or partly, with a metal or an electropositive radical: the salt of an -ous acid is usually indicated by the suffix -ite, the salt of an -ic acid by the suffix -ate
- that which lends a tang or piquancy; esp., sharp pungent humor or wit
- any of various mineral salts used as a cathartic, as Epsom salts, or to soften bath water, as a restorative, etc.
- Informal a sailor, esp. an experienced one
ME < OE sealt, akin to Ger salz < IE base *sal-, salt > L sal, Gr hāls, salt, Sans salila, salty