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Synonyms

goodbye

American  
[good-bahy] / ˌgʊdˈbaɪ /
Sometimes goodby, or good-bye

interjection

  1. farewell (a conventional expression used at parting).


noun

plural

goodbyes
  1. a farewell.

goodbye British  
/ ˌɡʊdˈbaɪ /
  1. farewell: a conventional expression used at leave-taking or parting with people and at the loss or rejection of things or ideas

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a leave-taking; parting

    they prolonged their goodbyes for a few more minutes

  2. a farewell

    they said goodbyes to each other

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of goodbye

First recorded in 1565–75; contraction of God be with ye