ISISアイシスFreq.FrequencyTop 50,000Meanings1nounISIS; Islamic State of Iraq and SyriaRefers to the militant group; often used in news contexts. Cross-referenced with イスラム国.See also: イスラム国ISISは国こく際さい的てきな脅きょう威いと見みなされている。ISIS is regarded as an international threat.