Definition of arvo noun from the Oxford Advanced Learner's Dictionary

 

arvo

 noun
noun
BrE BrE//ˈɑːvəʊ//
 
; NAmE NAmE//ˈɑːrvoʊ//
 
(pl. arvos)(Australian English, New Zealand English, informal)
 
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afternoon See you this arvo! Word Origin 1930s: abbreviation of afternoon (with voicing of the f) + -o.