by the way
by the way also by the bye {adv. phr.}
Just as some added fact or news; as something else that I think of. — Used to introduce something related to the general subject, or brought to mind by it.
We shall expect you; by the way, dinner will be at eight.
I was reading when the earthquake occurred, and, by the way, it was The Last Days of Pompeii that I was reading.
Categories:
Source: A Dictionary of American Idioms
