Definition of mass house in English:

mass house

noun

historical
  • A Roman Catholic church or other place of worship. (In the 17–18th centuries chiefly as a Protestant term of contempt.).

Origin

Early 17th century; earliest use found in True Account Bishop Fernes & Leighlin. From mass + house [interjection].

Pronunciation

mass house

/ˈmas ˌhaʊs/