Afternoon/ˌæftərˈnuːn/ Definition 1 of 3Pro Tip 1/3Cultural routine In many cultures, 'afternoon' is a time for rest or reduced activity. The town is quiet every afternoon, as most people rest. Pro Tip 2/3Greetings context 'Good afternoon' is a common greeting used between noon and evening. When she walked into the shop, the clerk said, 'Good afternoon!' Pro Tip 3/3Approximate timing Afternoon can be nebulous, often not strictly defined by exact hours. Let's meet in the afternoon, sometime after lunch.