Definition of afternoon noun from the Oxford Advanced American Dictionary

Oxford3000

afternoon

noun
/ˌæftərˈnun/
 
[uncountable, countable]
 
the part of the day from 12 p.m. until about 6 p.m.
this/yesterday/tomorrow afternoonIn the afternoon they went shopping.She takes an art class two afternoons a week.Are you ready for this afternoon's meeting?The baby always has an afternoon nap.Come over on Sunday afternoon.Where were you on the afternoon of May 21? see also good afternoon