Definition of Addendum
Quick Meaning of Addendum
additional material appended to a written work after its main text to supplement or clarify content
Detailed Definition of Addendum
a section added to the end of a book or document containing extra information
How to Pronounce Addendum
Stress pattern: oOo (3-syllable word).
Tip: Stress the second syllable: uh-DEN-dum. The 'um' at the end is pronounced like the 'um' in 'sum'
Watch out: ad-DEN-dum (stressing first 'a') or ADD-en-dum (using English plural form 'addendums')
Origin and Etymology of Addendum
From Latin addendum, gerundive of addere (to add) — literally 'that which must be added'
How to Use Addendum in a Sentence
Each example shows “addendum” with a CEFR level so learners can pick examples that match their fluency.
Synonyms and Antonyms of Addendum
Common Synonyms for Addendum
Smart Synonyms for Addendum — When to Use Each
- appendix
- longer, more detailed addition
- supplement
- material added to complete
- attachment
- document added separately
Antonyms of Addendum
Common Collocations with Addendum
These phrases pair with “addendum” in everyday English:
- add an addendum
- appendix and addendum
- contract addendum
- final addendum
Common Mistakes When Using Addendum
Even fluent speakers slip up with “addendum”. Here’s how to avoid the most common errors:
- ✗ Wrong: The addendum are attached
- ✓ Correct: The addendum is attached
- Why: Addendum is singular; plural is addenda. When singular, use 'is'; when plural addenda, use 'are'
- ✗ Wrong: I found two addendums in the book
- ✓ Correct: I found two addenda in the book
- Why: The correct Latin plural is addenda, not addendums, though addendums is sometimes used informally
Words Confused With Addendum
- Addendum vs Appendix: Both add extra info; appendix is longer and more detailed; addendum is brief supplementary note
Other Forms of Addendum
- Noun: addendum, addenda
Frequently Asked Questions About Addendum
What is the meaning of "Addendum"?
additional material appended to a written work after its main text to supplement or clarify content
How do you pronounce "Addendum"?
The IPA is /əˈdɛn.dəm/. Stress the second syllable: uh-DEN-dum. The 'um' at the end is pronounced like the 'um' in 'sum'
What part of speech is "Addendum"?
"Addendum" is a noun at C1 level (Common European Framework).
What are synonyms for "Addendum"?
Common synonyms include appendix, supplement, attachment.
How do you use "Addendum" in a sentence?
Try writing a short sentence about a personal experience using "addendum".