Simple Definition of anomaly

from our Learner's Dictionary

anomaly

noun

plural anomalies
somewhat formal : something that is unusual or unexpected : something anomalous
A storm like that is an anomaly for this area. [=a storm like that does not usually happen in this area]
We couldn't explain the anomalies in the test results.
The doctor detected an anomaly [=irregularity] in my heartbeat.

Cite this Entry

“Anomaly.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/anomaly. Accessed 8 Jun. 2026.

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