afternoon

UK: /ˌɑːftə^rˈnuːn/

US: /ˌæftɚˈnun/

US: (n. af′tər no̅o̅n′, äf′-; adj. af′tər no̅o̅n′, äf′-, af′-, äf′-)

WordReference Random House Learner's Dictionary of American English © 2025

af•ter•noon /ˌæftɚˈnun/   n. 

1. the time from noon until evening:
   [countable] every afternoon.
   [uncountable* by + ~]
   I'll get it done by afternoon.

adj. 

2. of, relating to, or occurring during the afternoon:
   an afternoon nap.

WordReference Random House Unabridged Dictionary of American English © 2025

af•ter•noon  (n. af′tər no̅o̅n′, äf′-;adj. af′tər no̅o̅n′, äf′-, af′-, äf′-), n. 

1. the time from noon until evening.
2. the latter part:
   the afternoon of life.

adj. 

3. pertaining to the latter part of the day.

• 1250–1300; Middle English; see after, noon

Collins Concise English Dictionary © HarperCollins Publishers::

afternoon / ˌɑːftəˈnuːn/ noun

1. the period of the day between noon and evening
2. (as modifier): afternoon tea
3. a middle or later part: the afternoon of life