Etymology

Romanism

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Today it means: The tenets of the Church of Rome; the Roman Catholic religion. Full definition →

First used 17th c.
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The story

From Roman + -ism, after Romanist. Compare Romish.

First known use, by meaning

  • from 17th c. The tenets of the Church of Rome; the Roman Catholic religion.

Etymology from Wiktionary, CC BY-SA 4.0.