postmeridian

[ pohst-muh-rid-ee-uhn ]
/ ˌpoʊst məˈrɪd i ən /

adjective

of or relating to the afternoon.
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. 2020

British Dictionary definitions for postmeridian

postmeridian
/ (ˌpəʊstməˈrɪdɪən) /

adjective

after noon; in the afternoon or evening

Word Origin for postmeridian

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