What does it mean to reject a proposed law?

To reject a proposed law means to refuse to accept it or allow it to be enacted. This process is often referred to as a veto, which is the power held by individuals in authority, such as a president or governor, to reject legislation passed by a legislative body. By exercising this veto power, the authority expresses disapproval and effectively prevents the proposed law from becoming effective unless overridden by a sufficient majority in the legislature.

In contrast, the other terms provided have different meanings. For instance, to override refers to the legislative process that allows a legislative body to pass a law despite a veto, usually requiring a supermajority vote. To amend means to make changes or additions to a proposed law or to an existing law, rather than rejecting it outright. To concede implies giving up a position or admitting defeat, which does not pertain to the legislative process of rejecting a proposed law. Thus, the term that best encapsulates the action of rejecting a proposed law is indeed veto.