noun

• (chemistry) One of the compounds formed from the reaction of an acid with a base, where a positive ion replaces a hydrogen of the acid.
• (uncommon, countable) A salt marsh, a saline marsh at the shore of a sea.
• (slang, countable) A sailor (also old salt).
  "Around the door are generally to be seen, laughing and gossiping, clusters of old salts."
• (cryptography) A sequence of random data added to plain text data (such as passwords or messages) prior to encryption or hashing, in order to make brute force decryption more difficult.

adj

• (figurative, obsolete) Bitter; sharp; pungent.
  "I have a salt and sorry rheum offends me […]."
• (figurative, obsolete) Salacious; lecherous; lustful; (of animals) in heat.
  "It is impossible you should see this, / Were they as prime as goats, as hot as monkeys, / As salt as wolves in pride, and fools as gross / As ignorance made drunk."
• (colloquial, archaic) Costly; expensive.

verb

• (transitive) To add salt to.
  "to salt fish, beef, or pork; to salt the city streets in the winter"
• (intransitive) To deposit salt as a saline solution.
  "The brine begins to salt."
• (nautical, of a ship) To fill with salt between the timbers and planks for the preservation of the timber.
• To insert or inject something into an object to give it properties it would not naturally have.

noun

• (obsolete) A bounding; a leaping; a prance.
  "[…] he hath the skill to draw Their nectar forth, with kissing; and could make More wanton salts from this brave promontory, Down to this valley, than the nimble roe;"