oration
/ɔːˈreɪʃən/noun
1- a formal speech, especially one given on a ceremonial occasion（尤指在礼仪场合的）正式演说, 正式演讲。
1.1
- mass noun the style or manner in which such a speech is given（正式的）演说风格：
there is nothing quite like his messianic oration.
他那救世主般的演说风格真是独树一格。
词源
late Middle English (denoting a prayer)： from Latin oratio（n-） 'discourse, prayer', from orare 'speak, pray'.