Definition of ciao exclamation from the Oxford Advanced Learner's Dictionary

 

ciao

 exclamation
exclamation
BrE BrE//tʃaʊ//
 
; NAmE NAmE//tʃaʊ//
 
(from Italian, informal)
 
jump to other results
goodbye Word Origin 1920s: Italian, dialect alteration of schiavo ‘(I am your) slave’, from medieval Latin sclavus ‘slave’.
See the Oxford Advanced American Dictionary entry: ciao