[ chah-aw; English chou ]
/ ˈtʃɑ ɔ; English tʃaʊ /
(used as a word of greeting or parting): hello; goodbye; so long; see you later.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for ciao
I believe the word is derived from “schiavo,” a slave, which became corrupted into “schiao,” and “ciao.”Selections from Previous Works|Samuel Butler
British Dictionary definitions for ciao
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012