Prn

phrase

phrase ·Rare ·Advanced level

Definitions

Adverb
  1. 1
    according to need (physicians use PRN in writing prescriptions) wordnet
Phrase
  1. 1
    Abbreviation of pro re nata. abbreviation, alt-of
  2. 2
    Abbreviation of pro re nata abbreviation, alt-of

    "“‘My return fare was £171. 6s. 0d. and I enclose the counterfoil. I have no record of other expenses; the major items were chilled liquid sedatives on the flight home at 55 cents a shot. Although taken prn, the last dose I remember is the fourth.”"

Example

More examples

"“‘My return fare was £171. 6s. 0d. and I enclose the counterfoil. I have no record of other expenses; the major items were chilled liquid sedatives on the flight home at 55 cents a shot. Although taken prn, the last dose I remember is the fourth.”"

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.