principal1/ˋprInsəpḷ; ˈprInsəp$l or ˈprInsIp$l/adj [only before noun 仅用于名词前] most important [ main ] 最重要的﹐首要的﹐主要的: the principal character in the book 书中的主人公our principal reason for making this journey 我们这次旅程的首要目的
principal2n [C] AmE the person in charge of a school or college [ head teacher BrE 【英】] 【美】〔中小学的〕校长﹔〔学院的〕院长