English Reference

Word

error

Phoneticser·ror, stress on the first syllable

US/ˈɛɹɝ/

UK/ˈɛɹɐ/

Definitions

01a mistake

A2 · Elementary Countable noun

n. a mistake or something you do that is not correct.

n. a mistake or an accidental wrong action resulting from poor judgement, lack of knowledge, or carelessness.

“The bank apologized for the error on my monthly statement.”

“The administrative error resulted in several hundred patients receiving the wrong appointment times for their consultations.”

Pitfall

I made an error in the test.

I made a mistake in the test.

While 'error' is correct, 'mistake' is much more common in everyday conversation and school contexts.

Antonyms

02computing failure

B1 · Intermediate Countable noun Computing Technical

n. a problem that stops a computer program from working correctly.

n. a failure of a computing device or program to complete a task, often resulting in a system message.

“A system error occurred while I was trying to save the document.”

“The software threw a critical error during the installation process, forcing the user to restart the operating system.”

Synonyms

03scientific/math difference

B2 · Upper Intermediate Countable noun Science Academic · Technical

n. the difference between a measured value and the perfect, true value.

n. the numerical difference between a measured or calculated value and the true or theoretical value.

“The margin of error in the survey was about three percent.”

“Researchers must account for instrumental error when interpreting the data from the high-precision sensors.”

Antonyms

04language mistake

C1 · Advanced Countable noun Linguistics Academic

n. a mistake made by someone learning a new language.

n. an unintentional deviation from the rules of a language made by a learner.

“The teacher corrected the grammatical error in the student's essay.”

“Interlanguage errors often reflect the learner's attempt to apply the grammatical structures of their native tongue to the target language.”

Synonyms

slipsolecism

05legal grounds for appeal

C1 · Advanced Countable noun Law Formal · Technical

n. a mistake in a court case that might allow for a new trial.

n. a mistake in a judicial proceeding that may provide grounds for a review or reversal of the judgement.

“The lawyer argued that there was a legal error during the trial.”

“The appellate court found a reversible error in the judge's instructions to the jury, leading to a stay of execution.”

Synonyms

06to fail or crash

C1 · Advanced Computing Informal · Technical

v. to stop working or show a mistake message on a computer.

v. to fail to function properly or to terminate a process prematurely, typically accompanied by a fault report.

“The app started to error every time I uploaded a photo.”

“The script began to error out after the database reached its maximum storage capacity.”

Synonyms

Collocations

Common phrases and expressions where native English speakers use the word “error” in context.

01. absolutely error 02. clearly error 03. error homogeneous 04. error occur 05. human error 06. standard error 07. systematic error

Confusables

error vs mistake

Mistake implies a lapse in judgment or a careless slip, while error suggests a failure to meet a technical standard or a formal rule.

RememberMistakes are human slips; errors are technical failures.

Etymology

From Middle English errour, from Anglo-Norman errour, borrowed from Old French error, from Latin error (“wandering about”, noun), derived from the verb errō (“to wander, to err”). Cognate with Gothic 𐌰𐌹𐍂𐌶𐌴𐌹 (airzei, “error”), Gothic 𐌰𐌹𐍂𐌶𐌾𐌰𐌽 (airzjan, “to lead astray”). More at err. By surface analysis, err + -or (suffix forming nouns of quality, state, or condition).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

error(A2)

Related words

Idioms

Domains

ComputingLawLinguisticsStatistics

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Common
Level
A2 · ElementaryOxford
Updated

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