noun (n)

• you advance to the next round in a tournament without playing an opponent(noun.communication)

  Example:
  He had a bye in the first round.
  

  Synonym:
  pass
  

  source: wordnet30
• a farewell remark(noun.communication)

  Example:
  They said their good-byes.
  

  Synonym:
  adieu, adios, arrivederci, au revoir, auf wiedersehen, bye-bye, cheerio, good day, good-by, good-bye, goodby, goodbye, sayonara, so long
  

  source: wordnet30
• A thing not directly aimed at; something which is a secondary object of regard; an object by the way, etc.; as in on or upon the bye, i. e., in passing; indirectly; by implication.(noun)

  source: webster1913
• A dwelling.(noun)

  source: webster1913
• In various sports in which the contestants are drawn in pairs, the position or turn of one left with no opponent in consequence of an odd number being engaged; as, to draw a bye in a round of a tennis tournament.(noun)

  source: webster1913