overarching
adjective [ before noun ] formal uk/ˌəʊ.vəˈrɑː.tʃɪŋ/ us/ˌoʊ.vɚˈɑːr.tʃɪŋ/
首要的；包罗万象的，支配一切的
most important, because of including or affecting all other areas
a grand overarching strategy 关乎全局的重大策略
The overarching theme of the election campaign was tax cuts. 竞选活动的首要主题是减税。