p.r.n.

American  

abbreviation

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

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prn British  

abbreviation

1. pro re nata

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Etymology

Origin of p.r.n.

From Latin prō rē nāta

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