postmeridian

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

adjective

of or relating to the afternoon.
occurring after noon: a postmeridian lull.

Origin of postmeridian

First recorded in 1620–30; post- + meridian

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