addendum
noun
ad·den·dum
ə-ˈden-dəm 
plural addenda
ə-ˈden-də
also addendums
also addendums
1
: a thing added : addition
2
: a supplement to a book
—often used in plural but singular in construction
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
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
Recent Examples on the Web
Before signing a lease agreement or any lease addendums, take time to carefully read through the terms.
—Tamia Fowlkes, jsonline.com, 20 Oct. 2025
In addition to the financial details, the documents also included an addendum that would prohibit Lively and the film's producers from pursuing matters related to the film in open court.
—Madison E. Goldberg, PEOPLE, 11 Oct. 2025
State regulators said the city didn’t seek their feedback or make the EIR addendum available for public review.
—Claire Wang, Oc Register, 10 Sep. 2025
Later on Tuesday, Trump sought to further distance himself from the attack, posting an addendum to an earlier statement from the White House that specified the decision was made by Israel’s leader and that the US learned of it too late to intervene.
—Tal Shalev, CNN Money, 9 Sep. 2025
See All Example Sentences for addendum
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Tamia Fowlkes, jsonline.com, 20 Oct. 2025
In addition to the financial details, the documents also included an addendum that would prohibit Lively and the film's producers from pursuing matters related to the film in open court.
—Madison E. Goldberg, PEOPLE, 11 Oct. 2025
State regulators said the city didn’t seek their feedback or make the EIR addendum available for public review.
—Claire Wang, Oc Register, 10 Sep. 2025
Later on Tuesday, Trump sought to further distance himself from the attack, posting an addendum to an earlier statement from the White House that specified the decision was made by Israel’s leader and that the US learned of it too late to intervene.
—Tal Shalev, CNN Money, 9 Sep. 2025
See All Example Sentences for addendum
Cite this Entry
“Addendum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/addendum. Accessed 31 Oct. 2025.
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