Definition of preachification in US English:

preachification

noun

rare, depreciative
  • Tedious or self-righteous preaching; preachifying.

Origin

Mid 19th century; earliest use found in John Lockhart (1794–1854), writer and literary editor. From preachify: see -fication.

Pronunciation

preachification

/ˌpriːtʃɪfɪˈkeɪʃn/