by the bye

1. 1.

   introducing a different topic

   “incidentally, I won't go to the party”

   Synonymsby the wayincidentallyapropos

Questions about by the bye

What does by the bye mean?

by the bye means "introducing a different topic".

What is another word for by the bye?

Close synonyms include by the way, incidentally, apropos. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is by the bye a common word?

by the bye is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.