Addendum: meaning, definitions and examples

An addendum is often used in formal documents or books to include supplementary information that was added after the initial work was completed.

• The contract had an addendum to address the new regulations.
• An addendum at the end of the book provided updates on the subject matter.

Supplement is used when something is added to enhance or complete something else, often in a way that provides additional information or improves its comprehensiveness.

• The magazine includes a supplement with extra articles on health and wellness.
• This guide serves as a supplement to the main textbook, offering more detailed examples.

An appendix is typically used in academic, technical, or instructional books to provide supplementary material such as data, charts, or explanations that are relevant to the main text.

• The appendix contains all the raw data from the experiments.
• In the appendix, you will find detailed explanations of each chapter's key points.

Addition is a general term for anything that is added to something else. It's commonly used in everyday language and can refer to both physical objects and abstract concepts.

• The addition of a new wing to the building doubled its size.
• Her latest work is a valuable addition to her previous research.