afternoon afternoon /ˈæftərˌnuːn/

noun

1. () The part of the day between noon and evening  ( arvo [Informal, Australian, New Zeland] , afternoon )
   the part of the day between noon and evening
    He spent a quiet afternoon in the park
   he spent a quiet afternoon in the park
   
2. () A conventional expression of greeting or farewell  ( good afternoon , afternoon )
   a conventional expression of greeting or farewell
    The sun is shining brightly, and it's a perfect afternoon for a walk
   The sun is shining brightly, and it's a perfect afternoon for a walk