Definition of postil in US English:

postil

noun

archaic
  • 1A marginal note or comment, especially on a biblical text.

    1. 1.1 A commentary, homily, or book of homilies.
      • ‘He offers two answers, and a postil. ‘I did not come into Communism as a young Briton in England, but as a Central European in the collapsing Weimar Republic.’
      sermon, lecture, discourse, address, lesson, talk, speech, oration, declamation
      View synonyms

Origin

Late Middle English: from Old French postille, from medieval Latin postilla, perhaps from Latin post illa (verba) ‘after those words’, written as a direction to a scribe.

Pronunciation

postil

/ˈpästl/