What is veto?
veto meaning The procedure, as allowed by the Constitution, by which the President refuses to approve a bill or joint resolution and thus prevents its enactment into law. A regular veto occurs when the President returns the legislation to the originating House without approval. It can be overridden only by a two-thirds vote in each House. A pocket veto occurs after Congress has adjourned and is unable to override the President’s action.
reference: Ben’s Guide U.S. Government – Glossary