Definition of "SSI"
SSI
noun
countable and uncountable, plural SSIs
(computing) Initialism of Server Side Include.
(US) Initialism of Supplemental Security Income.
(electronics) Initialism of Small Scale Integration.
(military, US) Initialism of shoulder sleeve insignia.
(finance) Initialism of standard settlement instruction.
(medicine) Initialism of surgical site infection.
proper noun
(sports) Initialism of Scuba Schools International.