the period between noon and midnight.
Origin of p.m.
From the Latin word post merīdiem
usage note for p.m.
Definition for p.m. (2 of 2)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for p.m.
P.M., pm or PM
(indicating the time period from midday to midnight) post meridiemSee a.m.
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