[noun] [C] - a part of a Christian church ceremony in which a priest gives a talk on a religious or moral subject, often based on something written in the BibleThe Reverend William Cronshaw delivered/preached the sermon.Today's sermon was on the importance of compassion.(disapproving) A sermon is also a long talk in which someone advises other people how they should behave in order to be better people.I really don't think it's a politician's job to go delivering sermons on public morality.
SERMON
Meaning of SERMON in English
Cambridge English vocab. Кембриджский английский словарь. 2012