Basic Guidelines For English Spellings
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The action or practice of preaching as a pulpiteer, or in the manner of a pulpiteer.
Early 18th century. From pulpiteer + -ing. Compare later pulpiteer, and also earlier pulpitizing.
That is, or is reminiscent of, a pulpiteer; preaching.
Late 19th century. From pulpiteer + -ing.