happening or existing a long time ago 很久以前的；以往的 a bygone age/era 一个过去的时代／历史时期 The family story was that, in bygone days, he had been a rich farmer in Australia. 家庭的故事是，在过去的日子里，他曾经是澳大利亚的富农。 The horse and cart belongs to a bygone era. 马车属于过去的时代。
Oxford Collocations DictionaryBygone is used with these nouns:- age
- era