What is the meaning of 'repeal' when used as a noun?

The term 'repeal' when used as a noun refers to a formal action of revoking or annulling a law or a policy. It embodies the idea of taking back the authority or validity of a previously enacted legal statute.

The choice indicating an official or legal cancellation accurately captures this meaning, as it reflects the formal nature of repealing a law. Abrogating, which refers to the act of declaring something legally void, also aligns with the concept of repeal in its implication of an authoritative declaration to nullify a law.

Thus, the correct answer encompasses both these aspects—highlighting that a repeal is not only an act but also signifies an official cancellation, affirming the comprehensive understanding of the term in legal contexts.