ＳＳＯ LinksSentence search for ＳＳＯSentence search for エス・エス・オーEdit in JMdict Noun1. single sign-on; SSOComputing, See also シングルサインオンNoun2. sun-synchronous orbit; SSOSee also 太陽同期軌道 Discussions Log in to talk about this word.