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The Collaborative International Dictionary
Postilling

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.