See also: asio, Asio, a sio, and asió English Pronunciation IPA(key): /ˈeɪʒoʊ/, /ˈeɪʃoʊ/ Proper noun ASIO Acronym of Audio Stream Input/Output. Acronym of Australian Security Intelligence Organisation. See also (Australian Security Intelligence Organisation): ASIS ONA Anagrams AIOs, AOIs, Iaso, siaoWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads