ad·den·dum | \ə-ˈden-dəm \
plural addenda\-ˈden-də \ also addendums

Definition of addendum 

1 : a thing added : addition

2 : a supplement to a book often used in plural but singular in construction

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Examples of addendum in a Sentence

Francine du Plessix Gray, in an essay first written in 1991 and updated with an addendum here, writes eloquently of a lifelong obsession with weight loss, stemming from the harsh judgments of a mother enraptured by fashion. — Ginia Bellafante, New York Times Book Review, 21 Sept. 2008 This qualification, however, is not a recent addendum to Derrida's career. In 1990, near the end of the period in which rhetoric and composition had a strong interest in his work, Derrida participated in an editor's interview … in which he characterized his project as fundamentally tied to the tradition it works both within and against. College English, September 2006 The letters are included as an addendum to the biography. there's an addendum from the author to explain certain stylistic choices that she made
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Recent Examples on the Web

Yesterday’s addendum mentioned the growing likelihood of an extended heat wave over the eastern United States during the first week of July. Greg Porter, Washington Post, "PM Update: Scattered showers early, clearing overnight. Warm and comfortable on Monday.," 24 June 2018 On May 15, the board unanimously passed a second addendum removing the residential requirement. Alexandra Kukulka,, "Village manager does not have to move to Glenview following board vote," 22 May 2018 Indeed, in the hunter-gatherer hierarchy, the rewards of hunting have always taken precedence over those of gathering: Meat is a main course and vegetables an addendum, even in our current phase of celebrating crudités. Ligaya Mishan, New York Times, "The Golden Age of Crudités," 8 Feb. 2018 Since the Committee introduced short-term rental restrictions in a 2016 addendum, Property Compliance Manager Neslihan Tesno said, six people have applied and all of them have had their applications rejected. Marialuisa Rincon, Houston Chronicle, "Township officials face challenges with Airbnb," 8 July 2018 Grant’s will was contested because the handwritten addendum had not been signed by witnesses, according to court documents., "With family grown apart, historic farm is in the middle," 13 July 2018 Two years ago, a state Department of Health study determined elevated rates of cancer in Warminster, Warrington, and Horsham Townships, but the overall results did not show a consistent pattern, according to a May addendum to the study. Laura Mccrystal,, "Toxins found in water near Bucks, Montco military bases more harmful than previously reported," 20 June 2018 The report includes an addendum showing Nelson concurred with all recommendations. Dennis Wagner, azcentral, "Phoenix VA inspection reveals issues with care, safety, public trust," 5 June 2018 In August, the Atlantic States Marine Fisheries Commission is scheduled to consider an addendum to increase Maine’s current state quota to the 2014 level, an 8 percent hike. National Geographic, "19 Eel Smugglers Sentenced, But Lucrative Trade Persists," 27 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'addendum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of addendum

1664, in the meaning defined at sense 1

History and Etymology for addendum

borrowed from Latin, neuter of addendus, gerundive of addere "to add"

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Statistics for addendum

Last Updated

9 Oct 2018

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Time Traveler for addendum

The first known use of addendum was in 1664

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More Definitions for addendum



English Language Learners Definition of addendum

: something that is added; especially : a section of a book that is added to the main or original text


ad·den·dum | \ə-ˈden-dəm \
plural addenda\ə-ˈden-də \

Kids Definition of addendum

: something added (as to a book)

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Comments on addendum

What made you want to look up addendum? Please tell us where you read or heard it (including the quote, if possible).


a state of commotion or excitement

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