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Interjection: so long
Usage: informal
  1. An informal farewell remark
    - cheers [Brit, informal], chin-chin [Brit, informal], toodle-oo [informal], toodle-pip [Brit, informal], ta-ta [Brit, informal], ta-ra [UK, informal], bye [informal], goodbye, bye-bye [informal], good-bye [N. Amer], good-by [US], farewell, sayonara [US, informal], vale [archaic]
Noun: so long
Usage: informal
  1. A farewell remark
    "She bid her friends so long before departing for her long journey";
    - adieu, adios, arrivederci, auf wiedersehen, au revoir, bye, bye-bye, cheerio [Brit, informal], good-by [US], goodby [US], good-bye [N. Amer], goodbye, good day, sayonara [US], farewell

Type of: farewell, word of farewell

Encyclopedia: So long, gay Bowser