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Synonyms

erroneously

American  
[ih-roh-nee-uhs-lee, e-roh-] / ɪˈroʊ ni əs li, ɛˈroʊ- /

adverb

  1. incorrectly; wrongly.

    For years I recorded my birth date erroneously as July 1, until I discovered from my father’s diary that it was actually July 30.

  2. by mistake; unintentionally.

    I just posted these comments again because they were erroneously wiped out the first time due to a technical issue.


Other Word Forms

Etymology

Origin of erroneously

erroneous ( def. ) + -ly

Explanation

If you’ve done something erroneously, you’ve made a mistake or accidentally given out wrong information. If you erroneously accuse your brother of eating the last slice of your pecan pie, then you’re wrong: he didn’t do it. Erroneously traces back to the Latin word errare, meaning “to stray, err.” If something’s done erroneously, you can think of it as straying from the right path and ending up going in the wrong direction. If you erroneously report to the IRS that you only made $500 last year and you really made $10,000, well, that’s a big mistake. If you do something erroneously, it’s typically by accident — you think it’s right but it isn’t.

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Vocabulary lists containing erroneously

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

That meant the system erroneously believed some cars had been lapped because they were not showing up on the correct timing loops, so it started showing blue flags when no-one had been lapped.

From BBC Jul. 28, 2026

Mr. Wright erroneously claims that Lincoln’s widely published 1862 letter to Greeley on the subject of emancipation marked “the first and only time a sitting US President has ever written a letter to the editor.”

From The Wall Street Journal Jun. 30, 2026

Johnson, he added, gets blamed for tampering with Social Security, with many people erroneously believing the president dipped into the program’s coffers.

From MarketWatch May 2, 2026

CORRECTION: A previous version of this article erroneously referenced the Department of Labor rather than the NLRB.

From Salon Mar. 13, 2026

But it was a misunderstanding, though unintentional, like a painting erroneously attributed to a master.

From "Vincent and Theo: The Van Gogh Brothers" by Deborah Heiligman

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