A more thorough explanation:

Absolute nullity refers to a situation where something is considered completely void or invalid from the beginning. This term is often used in legal contexts to describe a situation where a contract or agreement is deemed to have never existed.

For example, if a contract is signed under duress or fraud, it may be considered an absolute nullity, meaning that it is completely void and has no legal effect. Another example could be a marriage that is entered into by parties who are too closely related, which would be considered an absolute nullity.