noun
- Pope who signed a treaty with Mussolini recognizing the Vatican City as an independent state (1857-1939. ).
- synonyms: Achille Ratti, Ambrogio Damiano Achille Ratti
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). pius xi. Retrieved September 24, 2026, from http://smartdefine.org/pius_xi/definitions/1234696 |
| Chicago | WordNet. 2010. "pius xi" http://smartdefine.org/pius_xi/definitions/1234696 (accessed September 24, 2026). |
| Harvard | WordNet 2010, pius xi, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/pius_xi/definitions/1234696>. |
| MLA | WordNet. "pius xi" 23 October 2010. Web. 24 September 2026. <http://smartdefine.org/pius_xi/definitions/1234696> |