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p.m.

See more synonyms for p.m. on Thesaurus.com
  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.

P.M.

or PM

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

British Dictionary definitions for p.m.

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

(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