From Wiktionary, the free dictionary
From Mormon + -dom.
Mormondom (uncountable)
- (dated) Mormons collectively; Mormonism.
2012, Steve Cuno, Joanne Hanks, It's Not About the Sex, My Ass, →ISBN, page 27:I fretted about dying an old maid—which in Mormondom starts at around 21 years old—and ending up a plural wife to a stranger in heaven.
