momentous [məˈmentəs]

以下由轻松背单词网站提供

adj.重要的，重大的

very important because of effects on future events

I am deeply honoured to be invited to this momentous occasion. 能应邀出席如此重要的场合，我深感荣幸。
The momentous news was that war had begun. 重大的新闻是战争已经开始。