Question

What is the meaning of a line item veto and in which contexts is it used?

Answer 1

As the previous responder said, a line-item veto is used to veto only a part of a bill, especially appropriations bills, which can contain a huge number of provisions. Congress often likes to insert controversial measures into these, because they know the President will likely not veto the whole bill. Line-item veto is not allowed for the president by the United States Constitution, but was briefly used by Clinton when Congress passed the Line-item Veto act of 1996. It was ruled unconstitutional after its first use.

Answer 2

"In government, the line-item veto is the power of an executive to veto parts of a bill, usually budget appropriations. This enables an executive to nullify specific provisions of a bill, rather than only being able to approve or veto a bill in its entirety."