\Pos"til\, n. [F. postille, apostille, LL. postilla,
probably from L. post illa (sc. verba) after those (words).
Cf. {Apostil}.]
1. Originally, an explanatory note in the margin of the
   Bible, so called because written after the text; hence, a
   marginal note; a comment.
         Langton also made postils upon the whole Bible.
                                               --Foxe.
2. (R. C. Ch. & Luth. Ch.) A short homily or commentary on a
   passage of Scripture; as, the first postils were composed
   by order of Charlemagne.

\Pos"til\, v. t. [Cf. LL. postillare.]
To write marginal or explanatory notes on; to gloss. --Bacon.

\Pos"til\, v. i. [imp. & p. p. {Postiled} (?) or
{Postilled}; p. pr. & vb. n. {Postiling} or {Postilling}.]
To write postils, or marginal notes; to comment; to
postillate.
      Postiling and allegorizing on Scripture. --J. H.
                                               Newman.