Definition, Meaning & Synonyms

by-the-by

phrase
/baɪ ðə baɪ/
Definition
A phrase used to introduce a comment that is not directly related to the main topic.
Examples
  • By the by, did you hear about the new restaurant opening downtown?
  • She reminded me, by-the-by, that the meeting starts at ten.
  • Oh, by the by, I found your lost book in the library.
Meaning
Used to mention something casually in conversation, often as an aside.
Synonyms
  • incidentally
  • by the way
  • on a side note