\Pos"til*late\, v. t. [LL. postillatus, p. p. of
postillare.]
To explain by marginal notes; to postil.

      Tracts . . . postillated by his own hand. --C. Knight.

\Pos"til*late\, v. i.
1. To write postils; to comment.

2. To preach by expounding Scripture verse by verse, in
   regular order.