Salt definition

, from , from . Cognate with Dutch , German , Swedish ; and with Ancient Greek , Latin , Welsh , Russian .

A common substance, chemically consisting mainly of sodium chloride (NaCl), used extensively as a condiment and preservative.
One of the compounds formed from the reaction of an acid with a base, where a positive ion replaces a hydrogen of the acid.
A kind of marsh at the shore of a sea (short for salt marsh, apparently not in a wide-spread use).
A sailor (also old salt).
Additional bytes inserted into a plaintext message before encryption, in order to increase randomness and render brute-force decryption more difficult.
A person that engages in the political act of seeking employment at a company in order to help unionize it. IWW article PoliticalAffairs article

To add salt to.
To blast gold into (as a portion of a mine) in order to cause to appear to be a productive seam.
To add filler bytes before encrypting, in order to make brute-force decryption more resource-intensive.
To include colorful language in.
To insert or inject something into an object to give it properties it would not naturally have.
To add bogus evidence to an archeological site.