'Discourse' in the Bible

I composed the first discourse, O Theophilus, concerning all things which Jesus began both to do and to teach,

And Judas and Silas, being themselves also prophets, exhorted the brethren with much discourse, and strengthened them.

And having passed through those parts, and having exhorted them with much discourse, he came to Greece.

And the first day of the week, we being assembled to break bread, Paul discoursed to them, about to depart on the morrow. And he prolonged the discourse till midnight.