Definition of Roman fever in US English:

Roman fever

noun

  • 1A form of malaria prevalent in or (supposedly) specific to Rome. Now historical.

  • 2A strongly felt attraction towards Roman Catholicism, Roman Catholic doctrines, etc., on the part of an Anglican or other non-Catholic.

Origin

Early 18th century. From Roman + fever, after post-classical Latin febris Romana.

Pronunciation

Roman fever

/ˈrəʊmən ˈfiːvə/