Summary

1911 Encyclopædia Britannica, Volume 13… (1911)

Thus the finally fixed meaning of the word homily as an ecclesiastical term came to be a written discourse (generally possessing the sanction of some great name) read in church by or for the officiating clergyman when from any cause he was unable to deliver a sermon of his own. As the standard of clerical education sank during the dark ages, the habit of using the sermons of others became almost universal.
Source: Wikisource

1911 Encyclopædia Britannica, Volume 13… (1911)

In course of time the exposition of the lesson for the day came more frequently to assume a more elaborate character, and to pass into the category of a λόγος or even φιλοσοφία or φιλοσόφημα; but when it did so the fact was as far as possible denoted by a change of name, the word ὁμιλία being reserved for the expository or exegetical lecture as distinguished from the pulpit oration or sermon.
Source: Wikisource

1911 Encyclopædia Britannica, Volume 13… (1911)

But as no popular discourse delivered from the pulpit could ever be exclusively expository and as on the other hand every sermon professing to be based on Scripture required to be more or less “exegetical” and “textual,” it would obviously be sometimes very hard to draw the line of distinction between ὁμιλία and λόγος. It would be difficult to define very precisely the difference in French between a “conférence” and a “sermon”
Source: Wikisource

Get perspective with Kwize: daily news enlightened by great literature