Amendment has at least two meanings:

• An amendment is a formal alteration to any official document or record, typically with the aim of improving it. This alteration may take many forms, not only the addition of material (such as the Nineteenth Amendment to the United States Constitution, which grants voting rights to women) but also removal of excess, invalid or outdated text.

See also: constitutional amendment.

• An amendment may also be made to soil, such as with manure, for improving the nutrient content. See soil amendment