Veto is a Latin term meaning “I forbid.” It is an order that prohibits some proposed or intended piece of legislation where the prohibition is prescribed by a person in authority. It is the constitutional right or power of a ruler or legislature to cast a vote that blocks a decision and has a significant impact in finalizing the decision. Veto can be limited or absolute. For example in the US, a Presidential Veto of legislation can be overridden by passing the same again in both the House and Senate. U.N. Security Council permanent members can block any resolution and this power is absolute.