goodbye
Concise Oxford English Dictionary © 2008 Oxford University Press:
goodbye /ɡʊdˈbʌɪ/(US also goodby)
▶exclamation used to express good wishes when parting or ending a conversation. ▶noun (pl. goodbyes; US also goodbys) an instance of saying ‘goodbye’; a parting.
– origin C16: contr. of God be with you!
'goodbye' also found in these Oxford entries:
adieu
- adios
- arrivederci
- au revoir
- bye
- bye-bye
- cheerio
- farewell
- French leave
- hooray
- leave
- leave-taking
- sayonara
- so
- ta-ra
- ta-ta
- toodle-oo
- valediction

