(1) (Speech Application Language Tags) Extensions to HTML, XHTML and XML for voice recognition and synthesized speech and audio output. SALT is designed to support mixed modes including audio, video, text and graphics, depending on the device in the user's hands. For more information, visit the SALT Forum at www.saltforum.org.

(2) (salt) In cryptography, a random number that is added to the encryption key or to a password to protect them from disclosure. See cryptography.