Source : Webster's Revised Unabridged Dictionary (1913)

Postil \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.