by the way

Idioms & Phrases

by the way

  1. In passing, incidentally, as in She's my wife's cousin, and by the way, a good friend. [Mid-1500s]

  2. Parenthetically, in addition, as in We saw Mary last week, and by the way, did Tom call you? [Early 1600s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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