/əˈgɑ:st ||; əˈgæst/adj (not before a noun 不用于名词前) (written 书面语)aghast (at sth) filled with horror and surprise when you see or hear sth 吓呆；惊呆: He stood aghast at the sight of so much blood. 他一见到那么多血吓得目瞪口呆。