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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:

It said the crew members then "erroneously concluded that the number one and three engines had failed".

From BBC ● Sep. 11, 2026

The Los Angeles Police Department told Bass’ office that it had erroneously issued criminal citations to vendors around MacArthur Park, Bass spokesperson Paige Sterling told The Times on Thursday.

From Los Angeles Times ● Aug. 27, 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

Just as Polymarket’s betting contract was set to expire, ISW’s map erroneously showed Myrnohrad to be under Russian control, even though Russia hadn’t actually captured the town.

From The Wall Street Journal ● Apr. 23, 2026

Probably because it was the first generally practiced method of biological control, this setting of one insect against another is widely but erroneously thought to be the only alternative to chemicals.

From "Silent Spring" by Rachel Carson

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