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postmeridian

[pohst-muh-rid-ee-uh n]
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adjective
  1. of or relating to the afternoon.
  2. occurring after noon: a postmeridian lull.
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Origin of postmeridian

First recorded in 1620–30; post- + meridian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for postmeridian

postmeridian

adjective
  1. after noon; in the afternoon or evening
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Word Origin

C17: from Latin postmerīdiānus in the afternoon; see post-, meridian
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