Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun goodby
1 sense of goodby
Sense 1
adieu, adios, arrivederci, auf wiedersehen, au revoir, bye, bye-bye, cheerio, good-by, goodby, good-bye, goodbye, good day, sayonara, so long -- (a farewell remark; "they said their good-byes")
=> farewell, word of farewell -- (an acknowledgment or expression of goodwill at parting)