1
as in appendix
a part added at the end of a book or periodical
there's an addendum from the author to explain certain stylistic choices that she made
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2
as in increase
something added (as by growth)
with each new addendum the list of demands simply got more absurd
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Recent Examples of addendum
The devices had previously covered additional areas, including parts of Old Louisville, Smoketown, Newburg, Jacobs and Taylor Berry according to a map attached to a contract addendum signed by LMPD Chief Paul Humphrey last year.
—
Josh Wood, Louisville Courier Journal, 2 Mar. 2026
Lawyers at the Office of Policy and Strategy were frequently told to remove their findings from the main text of agency documents and include them as an addendum.
—Jonathan Blitzer, New Yorker, 17 Feb. 2026
Republicans framed the bathroom and driver’s license bill as an addendum clarifying the intent of a separate 2023 bill barring trans women from accessing female-only spaces.
—Matthew Kelly, Kansas City Star, 13 Feb. 2026
The lease addendums are a mandatory part of rental agreements across Arizona and the nation.
—AZCentral.com, 4 Feb. 2026
See All Example Sentences for addendum
Josh Wood, Louisville Courier Journal, 2 Mar. 2026
Lawyers at the Office of Policy and Strategy were frequently told to remove their findings from the main text of agency documents and include them as an addendum.
—Jonathan Blitzer, New Yorker, 17 Feb. 2026
Republicans framed the bathroom and driver’s license bill as an addendum clarifying the intent of a separate 2023 bill barring trans women from accessing female-only spaces.
—Matthew Kelly, Kansas City Star, 13 Feb. 2026
The lease addendums are a mandatory part of rental agreements across Arizona and the nation.
—AZCentral.com, 4 Feb. 2026
See All Example Sentences for addendum
Recent Examples of Synonyms for addendum
Noun
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Villa have had a great season but if Unai Emery was their brain and John McGinn was their heart, Elliott was their appendix.—
Tim Spiers,
New York Times,
26 May 2026
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Readers will find his email address in the book’s appendix, and Smat encourages people to share their story with him.—
Brayden Garcia
May 11,
Fort Worth Star-Telegram,
11 May 2026
Noun
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That was the largest increase in the plant’s more than 30-year history, records show.—
Jason Henry,
Oc Register,
30 May 2026
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Since 2019, the National Poison Data System has fielded a nearly 1,500% increase in calls related to overdoses or side effects from injectable weight loss drugs.—
Maia Rosenfeld,
NBC news,
29 May 2026
Noun
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In addition to the all-hours gym, there is a squash court for those who want to practice their serve.—
Condé Nast,
Condé Nast Traveler,
2 June 2026
-
Pulte will remain as chairman of Fannie Mae and Freddie Mac and FHFA director in addition to acting as national intelligence director.—
Connor Greene,
Time,
2 June 2026
Noun
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Other recent call-ups, like Nick Sogard and Mickey Gasper, have also given the lineup a boost.—
Mac Cerullo,
Boston Herald,
30 May 2026
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Dell said Thursday that its server unit had gotten a massive boost from widening AI adoption, challenging analysts’ assessment that demand for the business was already reflected in the stock price.—
Liz Napolitano,
CNBC,
29 May 2026
Noun
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Each productivity gain becomes a fresh opportunity for business owners to maximize their own gains while using the same technology to further control their employees.—
Christopher Marquis,
Time,
30 May 2026
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In facilities processing millions of parcels each day, even small gains in efficiency can translate into significant operational and economic advantages.—
Christopher McFadden,
Interesting Engineering,
30 May 2026
Cite this Entry
“Addendum.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/addendum. Accessed 5 Jun. 2026.
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