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noun

anomaly

/əˈnɒməli/  ·  say it: uh·NOM·uh·lee

something that deviates from the norm

In Nuance & Precision

In more detail

1. (noun) something that is different from what is normal or expected; something unusual or odd

2. (noun) something that does not fit a pattern or rule

Examples

How to use anomaly

Anomaly is used in both scientific and everyday contexts to describe something that deviates from expected patterns or norms. It is more formal and technical than 'oddity' or 'unusual thing', and often implies that the deviation is notable enough to warrant investigation or explanation. In science, it frequently refers to unexpected measurements or observations that don't align with theory.

Register: formal

Common phrases

Synonyms

irregularity · deviation · oddity · abnormality · exception

Opposites

norm · standard · regularity

Word family

anomalous (adjective) · anomalously (adverb)

A common mistake

Learners sometimes use 'anomaly' to mean simply 'a problem' or 'a mistake', but it specifically refers to something unusual or not fitting a pattern, not just any error or defect.

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