from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Goodbye.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. goodbye, adieu
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a farewell remark
Japanese sayōnara : sayō, thus (sa, that + yō, appearance from Middle Chinese jiang) + nara, if it be, indeed.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Japanese さようなら (sayōnara, "goodbye") (Wiktionary)