p.r.n.

abbreviation for

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

prn

abbreviation for

1. pro re nata

Word History and Origins

Origin of p.r.n.¹

From Latin prō rē nāta

Word History and Origins

Origin of p.r.n.¹

Latin: as the situation demands; whenever needed

Example Sentences

“This timeline of events raises questions as to whether the P.R.N. engineer violated federal statutes that prohibit destruction of evidence and obstruction of a congressional investigation, among others, when the engineer erased Secretary Clinton’s email contrary to congressional preservation orders and a subpoena,” Mr. Chaffetz said in the letter to Platte River.

From New York Times

Mr. Chaffetz said that a series of events in the days leading up to the deletions, including a conference call with Mrs. Clinton’s lawyers and the creation of a work ticket, “raises questions about whether Secretary Clinton, acting through her attorneys, instructed P.R.N. to destroy records relevant to the then-ongoing congressional investigations.”

From New York Times

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

From Project Gutenberg