Akademik

good afternoon
noun
a conventional expression of greeting or farewell
Syn: ↑afternoon
Hypernyms: ↑greeting, ↑salutation, ↑farewell, ↑word of farewell

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interj
somewhat formal
— used to say hello to someone in the afternoon

Good afternoon! Thanks for calling.

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ˌgood afterˈnoon 7 [good afternoon] exclamation
used to say hello politely when people first see each other in the afternoon; in informal use people often just say Afternoon.

Useful english dictionary. 2012.