addendum

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addendum

/əˈdɛn.dəm/ US, UK
/əˈden.dəm/ Australia

Rhymes with -ɛndəm

Where it comes from

Learned borrowing from Latin addendum, inflection of addendus (“annexed”), future passive participle of addō (“to add”).

noun addenda · addendums

Something to be added; especially text added as an appendix or supplement to a document. An addendum was added to the contract to clarify payment terms.
Similar: addend
A postscript.
The height by which the tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line.

Translations

Every language

noun something to be added

Español	adenda, addenda
한국어	부록 burok
中文	附件 fùjiàn
Português	adendo
Français	addendum
Deutsch	Anhang, Nachtrag
Ελληνικά	προσθήκη prosthíki, προσάρτημα prosártima
Русский	дополне́ние dopolnénije, приба́вка pribávka

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Cite this

MLA

"addendum." Wiktionary, via Micwyn, micwyn.com/word/addendum. Accessed 6 Nov. 2026.

APA

addendum. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/addendum

Chicago

"addendum." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/addendum.

BibTeX

@misc{addendum_2026,
  title = {addendum},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/addendum},
  urldate = {2026-11-06}
}