goodbye
interjection
°farewell; a formula used to another person or persons when the speaker or writer or the person addressed to is departing.
noun
°An utterance of goodbye, the wishing of farewell to someone.
synonyms: catch you later, bye, bye-bye, ciao more» , sayonara, see you, so long, ta ta, toodle-oo, ttfn, ttyl, adieu, adios, farewell, hasta la vista, hasta la vista, baby, later, laters, keep it real, peace out, toodles, peace, cya, cheerio, cheery-bye, toodle pip, buh-bye, good morn, good morning, good afternoon, good midday, good day, good eve, good evening, good night