From WordNet (r) 3.0 (2006):
bye
n 1: you advance to the next round in a tournament without
playing an opponent; "he had a bye in the first round"
[syn: bye, pass]
2: a farewell remark; "they said their good-byes" [syn: adieu,
adios, arrivederci, auf wiedersehen, au revoir,
bye, bye-bye, cheerio, good-by, goodby, good-bye,
goodbye, good day, sayonara, so long]