Definition: The word "addendum" and its definition are not widely recognized in English, nor is it used by many academic sources or dictionaries. The term has been commonly used to refer to a document appended to another document, especially when there is an amendment to an original contract, legal agreement, or other related document. In the context of law, "addendum" refers to any addenda to a contract that are not part of it. These can be small adjustments or additions made by both parties to clarify terms, conditions, or other issues. For example, in an insurance policy, there may be an addition for coverage under specific circumstances. In general, the purpose of adding additional information to a document is usually to correct mistakes, clarify ambiguities, or provide further details that were not previously mentioned. This can help clarify the scope and detail of a particular provision within a contract or document. The word "addendum" has been used in various contexts to refer to any addition made by either party to their own documents or agreements. It is not typically recognized as a formal legal term, but it is often used for informal purposes.