Definition of anomaly noun from the Oxford Advanced American Dictionary

 

anomaly

 noun
noun
NAmE//əˈnɑməli//
 
(pl. anomalies)anomaly (in something)
 
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a thing, situation, etc. that is different from what is normal or expected the many anomalies in the tax system the apparent anomaly that those who produced the wealth, the workers, were the poorest
See the Oxford Advanced Learner's Dictionary entry: anomaly