Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • abbreviation As the situation may require, such as in directions on medical charts by doctors for the benefit of nursing staff indicating actions that may be taken at their discretion depending on patient condition; or likewise instructions to a patient on a prescription indicating they may take the medicine if and when they feel the need for it

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin phrase pro re nata, "for the birth of a thing".

Support

Help support Wordnik (and make this page ad-free) by adopting the word PRN.

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.