nullity

The state or quality of being null.

Something that is null, especially an act having no legal validity.

The state or quality of being null or void; want of force or efficacy; insignificance; nothingness.

That which is null, void, invalid, or of no force or efficacy; a nonentity.

The quality or state of being null; nothingness; want of efficacy or force.

Nonexistence.

That which is null.

The state of being null, or void, or invalid.

A void act; a defective proceeding or one expressly declared by statute to be a nullity.

A corank.