by the way
- 1Used when you add something that is not the main thing you are talking about.
Like a small note written in the corner of a letter.
By the way, I saw your brother at the store today.
We're having pizza tonight, and by the way, Sam is coming too.
Similarincidentally, apropos
Note
- 2Not about the main thing that people are talking about.
The weather was bad, but that's by the way.
How much it cost is by the way. We needed a new car.
Note
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Origin
It first meant "by the side of the road". Its modern meaning dates from the 1600s.