as needed; as the circumstances require

Word History

Etymology

Latin pro re nata

Dictionary Entries Near prn

Cite this Entry

“Prn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prn. Accessed 25 Dec. 2024.

Medical Definition

prn

abbreviation
as needed; as the circumstances require
used in writing prescriptions
Etymology

Latin pro re nata

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!