Definition of ciao in English:

ciao

exclamation

informal
  • Used as a greeting at meeting or parting.

    ‘see you later—ciao!’
    • ‘Remnants of the Italian occupation during World War II exist in the capital, such as the use of ciao to say ‘good-bye.’’
    • ‘To say goodbye, most Uruguayans have adopted the Italian ciao or addio in place of the Spanish adios.’
    • ‘I opened the door, he kissed my cheeks and said ciao, and I walked away.’
    • ‘The penultimate week is tense, but everyone knows it's time to say ciao to Conte.’
    farewell, adieu
    View synonyms

Origin

Italian, dialect alteration of schiavo ‘(I am your) slave’, from medieval Latin sclavus ‘slave’.

Pronunciation

ciao

/tʃaʊ/