addition
noun
ad·di·tion
ə-ˈdi-shən 
a-
1
: a part added (as to a building or residential section)
The addition expanded the kitchen.
2
: anything or anyone added : increase
The clerk was a recent addition to the staff.
3
: the act or process of adding
a recipe enhanced by the addition of freshly ground pepper
especially
: the operation of combining numbers so as to obtain an equivalent simple quantity
schoolchildren learning about addition and subtraction
4
: direct chemical combination of substances into a single product
see also:
Examples of addition in a Sentence
The children learned addition and subtraction.
The museum's collection includes several new additions.
Recent Examples on the Web
In Los Angeles County, a December UC Berkeley report found 167 preschools closed between 2020 and 2024 — a decline in child care spots that researchers attributed partly to the addition of the public school grade.
—
Calmatters, Oc Register, 18 Feb. 2026
The Padres’ latest addition to the starting rotation competition is an old nemesis who has fallen on hard times.
—Kevin Acee, San Diego Union-Tribune, 17 Feb. 2026
Production is set to begin this spring on Los Angeles’ famed Venice Beach, in addition to the historic FOX Studio Lot in Century City.
—Mckinley Franklin, HollywoodReporter, 17 Feb. 2026
In addition to Melany, fellow students Nautica Walton, Taylor Jones, Natalie Griffith, Jaxson Beaver and Ronaldo Vega testified about the moments they were shot during the attack.
—Eric Levenson, CNN Money, 17 Feb. 2026
See All Example Sentences for addition
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.
Calmatters, Oc Register, 18 Feb. 2026
The Padres’ latest addition to the starting rotation competition is an old nemesis who has fallen on hard times.
—Kevin Acee, San Diego Union-Tribune, 17 Feb. 2026
Production is set to begin this spring on Los Angeles’ famed Venice Beach, in addition to the historic FOX Studio Lot in Century City.
—Mckinley Franklin, HollywoodReporter, 17 Feb. 2026
In addition to Melany, fellow students Nautica Walton, Taylor Jones, Natalie Griffith, Jaxson Beaver and Ronaldo Vega testified about the moments they were shot during the attack.
—Eric Levenson, CNN Money, 17 Feb. 2026
See All Example Sentences for addition
Cite this Entry
“Addition.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/addition. Accessed 19 Feb. 2026.
Copy CitationKids Definition
addition
noun
ad·di·tion
ə-ˈdish-ən
a-
1
: the result of adding : increase
2
: the act, process, or operation of adding
3
: a part added (as to a building)
Love words? Need even more definitions?
Merriam-Webster unabridged
