APOSTIL or POSTIL, properly a gloss on a scriptural text, particularly on a gospel text, hence any explanatory note on other writings. The word is also applied to a general commentary, and also to a homily or discourse on the gospel or epistle appointed for the day. The word in Mediaeval Latin was postilla, and this has been taken to represent post illa sc. verba textus, i.e., "after these words of the text."