Home › Words › O › oppositionalismoppositionalismoppositionalism means an oppositional approach or attitude.Among words judged in Lexicurio's Arena, oppositionalism ranks #15,411 of 42,749 for Qualifying.EtymologyFrom oppositional + -ism.nounAn oppositional approach or attitude.Definitions & examples from Wiktionary (CC BY-SA 3.0).