Erroneously, as in He took my coat by mistake. [c. 1700]
Words nearby by mistake
How to use by mistake in a sentence
This time it would be the biggest mistake for the Western press to repeat that—absolutely the biggest mistake.Ayaan Hirsi Ali: Our Duty Is to Keep Charlie Hebdo Alive|Ayaan Hirsi Ali|January 8, 2015|DAILY BEAST
Scalise has called the talk, which he delivered in a hotel outside New Orleans, “a mistake I regret.”
Scalise offered his contrition that he had made a mistake and apologized for appearing before a group some 12 years ago.
A step-by-step plan to break from your various technology addictions.
Make no mistake: The technology exists—has existed for a long while—to stop this from happening.Red Tape and Black Boxes: Why We Keep ‘Losing’ Airliners in 2014|Clive Irving|December 29, 2014|DAILY BEAST
All along the highways and by-paths of our literature we encounter much that pertains to this "queen of plants."
John was baptizing at a large pool called Ænon-by-Saleim,—probably allegorical, meaning “Fountain of Repose.”Solomon and Solomonic Literature|Moncure Daniel Conway
Instead of giving you a chance to say, "He has made a mistake," he forced you to say, "He has shown how to get out of a mistake."Music-Study in Germany|Amy Fay
The sewing-machine made a resounding clatter in the room; it was of a ponderous, by-gone make.The Awakening and Selected Short Stories|Kate Chopin
My mother now tells me that she knew of this mistake, an error of the New York paper in copying the item from a Southern journal.The Boarded-Up House|Augusta Huiell Seaman