A moralizing lecture.
A platitude.
A sermon, especially concerning a practical matter.
In a homey manner.
A spoken lesson or exposition, usually delivered to a group.
a class that primarily consists of a (weekly or other regularly held) lecture (as in sense 1)
A berating or scolding.
To preach, to berate, to scold.
To teach (somebody) by giving a speech on a given topic.