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p.r.n.

American  

abbreviation

  1. (in prescriptions) as the occasion arises; as needed.

prn British  

abbreviation

  1. pro re nata

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of p.r.n.

From Latin prō rē nāta

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

President of the Royal Institute of British Architects. p.r.n., pro re nata=For special business arising.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.