Home › Words › E › extroextro/ˈɛkstɹoʊ/extro means synonym of outro (“a portion of music at the end of a song”).Among words judged in Lexicurio's Arena, extro ranks #23,627 of 42,747 for Qualifying.extro is pronounced /ˈɛkstɹoʊ/.EtymologyFrom intro; see in- and ex-.nounSynonym of outro (“a portion of music at the end of a song”).Definitions & examples from Wiktionary (CC BY-SA 3.0).