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
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in increase
something added (as by growth)
with each new addendum the list of demands simply got more absurd
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of addendum
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
The show is light on tech, but the accompanying images (video design by Stefano DeCarli) pour through as addendums to Felder’s puissant passion of Liszt’s Liebesträume or Beethoven’s Für Elise and land with great effect.
—David John Chávez, Mercury News, 30 Jan. 2026
Hurts waited a beat before offering an interesting addendum.
—Zach Berman, New York Times, 13 Jan. 2026
See All Example Sentences for addendum
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
The show is light on tech, but the accompanying images (video design by Stefano DeCarli) pour through as addendums to Felder’s puissant passion of Liszt’s Liebesträume or Beethoven’s Für Elise and land with great effect.
—David John Chávez, Mercury News, 30 Jan. 2026
Hurts waited a beat before offering an interesting addendum.
—Zach Berman, New York Times, 13 Jan. 2026
See All Example Sentences for addendum
Recent Examples of Synonyms for addendum
Noun
-
Swalwell was among those named by Patel, who has said that his critics are mischaracterizing the appendix by calling it an enemies list.—
Perry Stein The Washington Post,
Arkansas Online,
29 Mar. 2026
-
An inflamed appendix becomes a ruptured one, leading to systemic infection.—
Dr. Lauren Palladino,
Hartford Courant,
22 Mar. 2026
Noun
-
As Christians around the world mark Holy Week, the Catholic Church in the United States is reporting a notable increase in attendance and interest in joining the faith.—
Loureen Ayyoub,
CBS News,
4 Apr. 2026
-
The likelihood of lightning increases as a thunderstorm gets closer and reaches its highest point when the storm is directly overhead.—
STAR-TELEGRAM WEATHER BOT,
Fort Worth Star-Telegram,
4 Apr. 2026
Noun
-
In addition to Slattery, Mardie Frye, Charlie Watson and Jayde Hudson scored goals in the shootout for Centennial.—
Darren Lauber,
Fort Worth Star-Telegram,
1 Apr. 2026
-
Add remaining meringue in 3 batches, gently folding with a rubber spatula after each addition until only a few streaks of meringue remain (err on the side of undermixing to keep the cake batter billowy).—
Shilpa Uskokovic,
Bon Appetit Magazine,
1 Apr. 2026
Noun
-
Basically, this treatment entails using a sample of your own blood to create a more concentrated version that’s rich in growth factors — then, that version is injected into your scalp to give your hair follicles a boost.—
Rebecca Strong,
USA Today,
3 Apr. 2026
-
The next morning, the in-tent coffee machine provided a necessary boost to start the day after a good night’s sleep.—
Patrick Connolly,
The Orlando Sentinel,
3 Apr. 2026
Noun
-
Dark green in particular, such as bottle green, gains depth when combined with a shade like petrol or teal.—
Jana Ackermann,
Glamour,
28 Mar. 2026
-
However, peeling back the curtain, that support drops substantially when looking solely at younger Republicans and conservative-leaning independents — two groups that Trump made gains with in 2024.—
Elena Moore,
NPR,
28 Mar. 2026
Cite this Entry
“Addendum.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/addendum. Accessed 5 Apr. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
