A deviation from the common rule or form.

Something that is unusual or unexpected.

कुछ ऐसा जो असामान्य या अप्रत्याशित हो।

English Usage: This event was an anomaly in a series of otherwise routine occurrences.

Hindi Usage: यह घटना सामान्य घटनाओं की श्रृंखला में एक असामान्य घटना थी।