oration

US /ɔːrˈeɪ.ʃən/
UK /ɔːrˈeɪ.ʃən/
"oration" picture
1.

a formal speech, especially one given on a ceremonial occasion or as part of a ceremony

:
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The president delivered a powerful oration at the national memorial.
•
His commencement oration inspired all the graduates.
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speechaddressdiscourselecturesermon