See also: smo English Noun SMO (plural SMOs) Initialism of site management organization; an organization that provides clinical trial related services. Initialism of social movement organization. Initialism of special military operation. Initialism of social media optimization. Anagrams MOS, MOs, OMS, OMs, SOM, Som., mos, mos', oms, osm, som, som' Czech Pronunciation IPA(key): [ɛs ɛm oː] Audio:(file) Proper noun SMO f Initialism of Světová meteorologická organizace. – World Meteorological Organisation, WMO Declension This proper noun needs an inflection-table template.Wikiwand - on Seamless Wikipedia browsing. On steroids.