Sayonara is defined as goodbye in Japanese.
When you are leaving a party and you want to shout goodbye to everyone, this is an example of a time when you would say "sayonara!"
Origin of sayonaraJpn, literally , if it is to be that way ; from say?, that way + nara, if
Used to express farewell.
Origin of sayonaraJapanese sayonara, say&omacron;nara, alteration of say&omacron; naraba, if be thus (said to indicate that the time for departure has come) : say&omacron;, thus (sa, that + y&omacron;, appearance, from Middle Chinese jiang`; also the source of Mandarin yang`) + naraba, if it be.