The word "addendum" refers to an additional piece of information or material that is added to a document, book, or report. It is often used to provide further details, clarifications, or supplementary data that were not included in the original text. An addendum can take many forms, including notes, corrections, or new information that enhances the understanding or completeness of the original work.
The term "addendum" comes from Latin, where "addere" means "to add." The Latin word "addendum" itself is a neuter gerundive form that translates to "something to be added," highlighting its purpose of indicating additional information.