An expression of good wishes at the parting of friends, originally addressed to the one setting forth, but in later use a mere formula of civility…

figurative. An expression of regret at leaving anything, or a mere exclamation = Goodbye to, no more of. Also farewell to, and farewell it.

Used as an expression of farewell: ‘goodbye’.

Farewell; goodbye; adieu.

As an informal expression of farewell: ‘goodbye’. Cf. ta-ta, int.

Esp. in Italy or in Italian contexts: used as an expression of farewell. Also as n.: a parting salutation. Cf. ciao, int.

Used to express good wishes when parting or at the end of a conversation. Cf. to say (also bid, etc.) goodbye at phrases 1, to kiss (also wave) g…

= goodbye, int. Cf. bye-bye, int.2 n.2

Used as an expression of farewell. Also in extended use.

= goodbye, int. Cf. bye, int.

‘Goodbye’. Also as n. in to shake a (also one's) day-day and variants: to wave goodbye. Cf. bye-bye, int.2 night-night, int. ta-ta, int.

Cf. tatty-bye, int. and T.T.F.N. int. at T, n. initialisms 1a.

Hail! welcome!—Farewell! adieu!

Chiefly in Japanese contexts: used to express good wishes when parting; ‘goodbye’.

Good-bye. Cf. hurroo, int.

Used to express good wishes on parting, typically in a cheerful or friendly manner; = cheerio, int. 2.

‘Goodbye’. Cf. pip-pip, int. n.

Australian. (Also hooroo and other variants.) = hooray, int.

Used to express good wishes on parting, typically in a cheerful or friendly manner: ‘goodbye’. Also used to suggest that something has been…

colloquial. Goodbye. Cf. toodle-pip int. at toodle-oo, int. derivatives. Now chiefly archaic.

‘Goodbye.’

Used as a cheerful expression of farewell: ‘goodbye’. Cf. cheero, int. 2.

Originally Australian. Now chiefly British. Used as a parting salutation: ‘goodbye’.

= ta-ta, int. n., in familiar use.

An informal Italian greeting or farewell (also affected as a fashionable expression by English speakers): hello, good-bye.

= toodle-oo, int.

A colloquial form of farewell.