Definition of mystagoguery in US English:

mystagoguery

noun

  • Initiation into mysteries; instruction in arcane knowledge preparatory to such initiation. Often derogatory with suggestion of obscurantism, charlatanism, etc.

Origin

1920s; earliest use found in The Observer. From mystagogue + -ery.

Pronunciation

mystagoguery

/ˈmɪstəɡɒɡ(ə)ri/