GOODBYE
adieu, adios, arrivederci, auf wiedersehen, au revoir, bye, bye-bye, cheerio, good-by, goodby, good-bye, goodbye, good day, sayonara, so long
(noun) a farewell remark; “they said their good-byes”
Source: WordNet® 3.1
Etymology
Interjection
goodbye
Farewell; a formula used to another person or persons when the speaker, writer, or person addressed is departing.
Synonyms
• (formal): adieu, farewell
• (informal): catch you later, bye, bye-bye, see ya, see you, so long, mind how you go, ta ta, tatty bye, toodeloo, toodles, TTFN, ttyl
• (slang): buh-bye, hasta la vista, later, laters, keep it real, peace, peace out, take it easy; cya
• adios, arrivederci, au revoir, do svidanya/do svidaniya, sayonara
• (UK, informal): cheerio, cheers, cheery-bye, toodle pip (dated)
• See also: goodbye
Hyponyms
• good night (during night)
Hypernyms
• aloha
• ciao
Noun
goodbye (plural goodbyes)
An utterance of goodbye, the wishing of farewell to someone.
Verb
goodbye (third-person singular simple present goodbyes, present participle goodbying, simple past and past participle goodbyed)
To say goodbye; to wish somebody farewell on parting.
Source: Wiktionary
Good`-by", Good`-bye", n. or interj. Etym: [A contraction of God be
with ye (God be wî ye, God bw' ye, God bwye).]
Definition: Farewell; a form of address used at parting. See the last Note
under By, prep. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition