When there is a coup, a group of people seize power in a country.
例句
...a military coup...軍事政變They were sentenced to death for their part in April's coup attempt.他們因參與了4月份的政變而被判處死刑。
了不起的成就;成功之舉
A coup is an achievement which is thought to be especially good because it was very difficult.
例句
The sale is a big coup for the auction house...這筆交易是該拍賣行的一大成功之舉。Regency Opera have scored something of a coup by persuading her to undertake the role.雷根希歌劇院說服她扮演這一角色從而取得了巨大成功。