English Reference

Word

anomaly

Phoneticsanom·aly

US/əˈnɑməɫi/

UK/ɐnˈɒməlˌi/

Definitions

01a deviation from the norm

C1 · Advanced Countable noun Academic

n. something that is unusual or different from what is normal.

n. a deviation from a common rule, type, arrangement, or form; an outlier in a dataset or pattern.

“The snowstorm in the middle of summer was a complete anomaly.”

“The researchers treated the sudden spike in temperature as a statistical anomaly rather than evidence of a new trend.”

Synonyms

irregularityabnormalityoutlier

02a physical defect

C2 · Proficiency Countable noun Medicine Technical

n. a part of the body that has not developed in the normal way.

n. a structural or functional defect or malformation, especially one present from birth.

“The doctor explained that the heart anomaly was something he was born with.”

“Advanced prenatal screening can now detect minor physical anomalies that might have gone unnoticed in previous decades.”

Synonyms

malformationdefectdeformity

03astronomical angle

C2 · Proficiency Countable noun Astronomy Technical

n. a specific angle used to describe where a planet is in its orbit.

n. any of several angular distances used to describe the position of a celestial body in its orbit.

“The scientist calculated the true anomaly to find the planet's exact location.”

“To accurately predict the satellite's trajectory, the ground team had to account for the mean anomaly at the specific epoch.”

Real-World Examples

“Spain's population density is a European anomaly, with 90 percent of residents living in just 2.6 percent of the country.”
The Local 14 Aug 2026
“It is not the Neanderthal pelvis that is the anomaly requiring explanation.”
Phys.org 17 Aug 2026

Etymology

From Latin anomalia, from Ancient Greek ἀνωμαλία (anōmalía, “irregularity, anomaly”), from ἀνώμαλος (anṓmalos, “irregular, uneven”), negating the meaning of ὁμαλός (homalós, “even”), from ὁμός (homós, “same”).

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

Word family

NOUN

anomaly(C1)

ADJECTIVE

Domains

AstronomyBiology

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.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL 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: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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