Anomalous vs Undefined - What's the difference?

As adjectives the difference between anomalous and undefined

is that anomalous is deviating from the normal; aberrant or abnormal while undefined is lacking a definition or value.

(en adjective)

Deviating from the normal; aberrant or abnormal.

Of uncertain or unknown categorization.

Having anomalies.

* anomalously

(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined