• synonyms


  1. after noon.
  2. the period between noon and midnight.
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Origin of p.m.

From the Latin word post merīdiem

Usage note

See a.m.


or PM

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for p.m.

siesta, teatime, P.M.

British Dictionary definitions for p.m.


P.M., pm or PM

abbreviation for
  1. (indicating the time period from midday to midnight) post meridiemSee a.m.
  2. post-mortem (examination)
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Word Origin for p.m.

(sense 1) Latin: after noon
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

Word Origin and History for p.m.

abbreviation of Latin post meridiem "after noon."

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Online Etymology Dictionary, © 2010 Douglas Harper