What is the definition of undegone?

"Undegone" is not a standard word in English. It appears to be a misspelling of "undergone".

Undergone is the past participle of the verb "undergo." It means to experience something, especially something unpleasant or difficult.

Here are some examples:

* "She has undergone extensive surgery."

* "The company has undergone a major restructuring."

* "He has undergone a lot of pain and suffering."