In general, if we talk in lay man language Amendment means change in any legal document made by adding, altering, or omitting a certain part or term. Documents which need to be amend has to be signed by all concerned party members. Simple example can be of carpet ordering for our new house, after ordered new carpet for our newly bought house, due course of time I realized I had forgotten one of the rooms carpet. I might need to call the contractor to write an amendment to our contract to include the same.
2) List of Amendments to the United States Constitution.
Till date Thirty-three Amendments/changes to the United States Constitution have been proposed by the United States Congress and sent to the states