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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Antonyms & Near Antonyms
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 Johnsons claim that’s at odds with a utility addendum in their lease.
—
Nora O'Neill, Charlotte Observer, 8 Jan. 2026
He’s talked with fellow memorial monument suppliers about adding an addendum to large orders telling buyers that the price could be later adjusted depending on if tariff rates move.
—Alex Harring, CNBC, 30 Nov. 2025
Matariyeh’s lawyer William Walker had submitted Norgaard addendums to Mataryieh’s guilty pleas in August.
—Dale Morin, Twin Cities, 26 Nov. 2025
This latter addendum would cover athletes like Imane Khelif, a boxer who made headlines at the most recent Olympic games.
—Abby Monteil, Them., 11 Nov. 2025
See All Example Sentences for addendum
Nora O'Neill, Charlotte Observer, 8 Jan. 2026
He’s talked with fellow memorial monument suppliers about adding an addendum to large orders telling buyers that the price could be later adjusted depending on if tariff rates move.
—Alex Harring, CNBC, 30 Nov. 2025
Matariyeh’s lawyer William Walker had submitted Norgaard addendums to Mataryieh’s guilty pleas in August.
—Dale Morin, Twin Cities, 26 Nov. 2025
This latter addendum would cover athletes like Imane Khelif, a boxer who made headlines at the most recent Olympic games.
—Abby Monteil, Them., 11 Nov. 2025
See All Example Sentences for addendum
Recent Examples of Synonyms for addendum
Noun
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The winter Olympic games are often seen as more of an appendix to their larger summertime counterparts than a tentpole in themselves.—
Alison Herman,
Variety,
6 Feb. 2026
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In 2010, 4-year-old Timothy Thomas died of a ruptured appendix while in the custody of the Martins at one of the group’s homes in Colton, authorities said.—
Clara Harter,
Los Angeles Times,
6 Feb. 2026
Noun
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The focus areas expected to power these margin increases for FedEx include its high-value B2B and specialized B2C segments.—
Glenn Taylor,
Sourcing Journal,
13 Feb. 2026
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Without that data, the BLS assumed that no price increases had taken place during the month for most categories of goods and services.—
Greg Iacurci,
CNBC,
13 Feb. 2026
Noun
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In addition to the Sierra population, there are about 20 Sierra Nevada red foxes living in the Cascade mountain range of Northern California.—
Clara Harter,
Los Angeles Times,
11 Feb. 2026
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In addition to academic affairs, the provost oversees seven other offices focused on faculty, graduate studies and enrollment.—
Lily Kepner,
Austin American Statesman,
10 Feb. 2026
Noun
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Universities across the state will also get a sizable boost from the funding bills.—
Lisa Hagen,
Hartford Courant,
13 Feb. 2026
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But now researchers say a quick nap might offer that same kind of brain boost.—
Hunter Boyce,
AJC.com,
11 Feb. 2026
Noun
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These performance gains have immediate implications for safety during human–robot interaction.—
New Atlas,
New Atlas,
8 Feb. 2026
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Jason Wilbanks was charged with computer tampering, evidence tampering, using his office for personal gain, and soliciting to commit a drug crime.—
Rob Picheta,
CNN Money,
7 Feb. 2026
Cite this Entry
“Addendum.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/addendum. Accessed 14 Feb. 2026.
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