Standard Lemma guide

addendum

noun · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • General-American, Received-Pronunciation: /əˈdɛn.dəm/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • Australian: /əˈden.dəm/
  • CMU ARPABET: AH0 D EH1 N D AH0 M Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

Something to be added; especially text added as an appendix or supplement to a document.

Definition source: English Wiktionary via Wiktextract

Examples

  • An addendum was added to the contract to clarify payment terms.
  • The author included an addendum at the end of the book.

Meaning relationships

Synonyms: addend

Antonyms: none provided

2

noun

Meaning 2

A postscript.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

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.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

textual matter that is added onto a publication; usually at the end

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: supplement, postscript

Antonyms: none provided

Broader terms: matter

Narrower terms: appendix, sequel, continuation

History

Etymology

From the gerundive of Latin addere (“to add”).

Across languages

Translations

40 source translations are retained for this English entry.

  • Armenian: հավելված (havelvac) — something to be added
  • Armenian: լրացում (lracʻum) — something to be added
  • Bulgarian: приба́вка (pribávka) — something to be added
  • Bulgarian: допълне́ние (dopǎlnénie) — something to be added
  • Catalan: addenda — something to be added
  • Chinese Cantonese: 附錄 /附录 (fu6 luk6) — something to be added
  • Chinese Mandarin: 附件 (fùjiàn) — something to be added
  • Danish: tillæg — something to be added
  • Dutch: addendum — something to be added
  • Esperanto: alaĵo — something to be added
  • Finnish: liite — something to be added
  • French: addendum — something to be added
  • Georgian: დანართი (danarti) — something to be added
  • Georgian: დოკუმენტის დანართი (doḳumenṭis danarti) — something to be added
  • German: Anhang — something to be added
  • German: Nachtrag — something to be added
  • Greek: προσθήκη (prosthíki) — something to be added
  • Greek: προσάρτημα (prosártima) — something to be added
  • Hungarian: hozzáfűznivaló — something to be added
  • Ido: adjuntajo — something to be added
  • Indonesian: adendum — something to be added
  • Irish: aguisín — something to be added
  • Irish: breis — something to be added
  • Kannada: ಅನುಬಂಧ (anubandha) — something to be added
  • Korean: 부록 (burok) — something to be added
  • Malay: adendum — something to be added
  • Malay: penambah — something to be added
  • Malayalam: അനുബന്ധം (anubandhaṁ) — something to be added
  • Māori: kupu āpiti — something to be added
  • Norwegian Bokmål: tillegg — something to be added
  • Norwegian Bokmål: tilføyelse — something to be added
  • Norwegian Nynorsk: tillegg — something to be added
  • Norwegian Nynorsk: tilføying — something to be added
  • Polish: addendum — something to be added
  • Portuguese: adendo — something to be added
  • Russian: дополне́ние (dopolnénije) — something to be added
  • Russian: приба́вка (pribávka) — something to be added
  • Spanish: adenda — something to be added
  • Spanish: addenda — something to be added
  • Swedish: tillägg — something to be added