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 addition to Point Loma and Clairemont, District 2 includes Mission Beach and Ocean Beach.
—
David Garrick, San Diego Union-Tribune, 11 Mar. 2026
The addition of Crosby was supposed to be the piece to help lift the Ravens over the top, with the draft picks expected to be part of a rebuilding effort for the Raiders.
—Los Angeles Times, 11 Mar. 2026
In addition to becoming the latest defender to find a new home, Chenal becomes the sixth member of the class to leave the team in free agency.
—Pete Sweeney, Kansas City Star, 11 Mar. 2026
In addition, the visitor center has the Adult at Kids Rate offer, in which grown-ups visit at the child-ticket rate of $67, a $10 discount.
—Dewayne Bevil, The Orlando Sentinel, 10 Mar. 2026
See All Example Sentences for addition
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David Garrick, San Diego Union-Tribune, 11 Mar. 2026
The addition of Crosby was supposed to be the piece to help lift the Ravens over the top, with the draft picks expected to be part of a rebuilding effort for the Raiders.
—Los Angeles Times, 11 Mar. 2026
In addition to becoming the latest defender to find a new home, Chenal becomes the sixth member of the class to leave the team in free agency.
—Pete Sweeney, Kansas City Star, 11 Mar. 2026
In addition, the visitor center has the Adult at Kids Rate offer, in which grown-ups visit at the child-ticket rate of $67, a $10 discount.
—Dewayne Bevil, The Orlando Sentinel, 10 Mar. 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 14 Mar. 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)
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