insular areaglossary / INSULAR AREA insular area. A territory or commonwealth. • This phrase is used by some writers to denote the genus of which the terms territory and commonwealth are species. See COMMONWEALTH(2); TERRITORY(1). 词条贡献者 双语律师李黎,国际知名法学院法律专业,擅长翻译各类与消费者金融诉讼相关的法律文件。