# addendum

/əˈdɛndəm/ (US) · /ɐdˈɛndəm/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/addendum
Updated: 2026-05-19

## Definition

a short document that adds extra information to a longer one. You use it when you need to include something new without changing the original text.

For teachers: a supplementary document or section that provides additional information to a primary text. Often used in legal, academic, or technical contexts to clarify or expand upon existing content.

## Examples

- The addendum explains the new safety rules.
- The contract includes an addendum that outlines the specific terms of the insurance coverage.
- The final report was accompanied by a detailed addendum addressing the concerns raised by the technical committee regarding the initial data collection methods.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.