A more thorough explanation:

Definition: Something that is void or has no legal force. A nullity may be treated as if it never occurred.

Nullities are commonly found in the context of marriages. For example, if a marriage was not properly licensed, solemnized, and authenticated, it may be considered a nullity. This means that the marriage is not legally recognized and can be treated as if it never happened. Another reason for a nullity of marriage is if the marriage is found to be invalid due to incest or fraud.

However, the term "nullity" is not limited to marriages. In Illinois, the "nullity rule" voids judgments rendered in cases where a person who was not entitled to practice law represented one of the parties. This means that the judgment is not legally valid and can be treated as if it never happened.

Overall, a nullity is something that is considered to have no legal force and can be treated as if it never occurred.