C2[U or C]a change or changes made to the words of a text: He insisted that the book did not need amendment.I've made a few last-minute amendments to the article.Presidential power was reduced by a constitutional amendment in 1991.Legislation and law-makingAdapting and modifying ChangingAdapting and attuning to something›[C]a change to a law that is not yet in operation and is still being discussed: An amendment to the bill was agreed without a vote.Legislation and law-making