Definition of bye noun from the Oxford Advanced Learner's Dictionary

 

bye

 noun
noun
BrE BrE//baɪ//
 
; NAmE NAmE//baɪ//
 
 
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  • (sport) a situation in which a player or team does not have an opponent in one part of the competition and continues to the next part as if they had won
  • Word Originnoun mid 16th cent. (denoting a side issue or incidental matter): from by.Idioms
    by the way(also by the by/bye)
     
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     (informal) used to introduce a comment or question that is not directly related to what you have been talking about By the way, I found that book you were looking for. What's the time, by the way? Oh by the way, if you see Jackie, tell her I'll call her this evening.
    See the Oxford Advanced American Dictionary entry: bye