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addendum

UK/əˈdɛn.dəm/US/əˈdɛn.dəm/
nounC1Rare in speech; mostly a word you read · #11,932 of 15,258neutral

Other forms: addenda, addendums

An addendum is something added at the end of a document. A brief addendum, an addendum to the contract, note the addendum.

It is added after the main text was settled, which is why contracts use them rather than rewriting the whole thing — and why reading only the main document can mislead. The plural is addenda. Note that the Latin is a gerundive meaning a thing to be added, formed exactly like memorandum and agenda.

Definitions of addendum

  1. 1nounaddendumSomething added at the end of a document.C1

    “An addendum to the contract changed the delivery date.”

addendum is an addition.

Where it comes from

Latin addendum is the gerundive of addere, to add — a thing to be added. Memorandum and agenda are formed the same way.

  1. Proto-Indo-European

    *deh₃-

  2. Latin

    addere — to add

  3. English, today

    addendum

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

Etymology from Wiktionary, CC BY-SA

Practised in A Song of Ice and Fire

Practise this word

addendum in the wild

  • An addendum or appendix, in general, is an addition required to be made to a document by its author subsequent to its printing or publication.

    Addendum

  • The book also contains an addendum compiled by Pyle that lists butterflies described by Nabokov and butterflies named after him.

    Nabokov's Butterflies

From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.