Constitutional Convention: The Constitutional Convention was a meeting held in 1787 where delegates from the states gathered to draft and create the United States Constitution.
Amendment: An amendment is a change or addition made to an existing legal document, such as the Constitution. It allows for modifications to be made without completely rewriting the entire document.
Ratification: Ratification refers to the formal approval or acceptance of a legal document by those who have the authority to do so. In this context, it relates to states approving and adopting the U.S Constitution after it was drafted.