adverb
- According to need (physicians use PRN in writing prescriptions. )
- usage: "add water as needed"
- synonyms: as needed, as required, pro re nata
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). prn. Retrieved September 20, 2026, from http://smartdefine.org/prn/definitions/1252970 |
| Chicago | WordNet. 2010. "prn" http://smartdefine.org/prn/definitions/1252970 (accessed September 20, 2026). |
| Harvard | WordNet 2010, prn, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/prn/definitions/1252970>. |
| MLA | WordNet. "prn" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/prn/definitions/1252970> |