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
With the addition of Santa Rosa, the airline now operates at 14 airports across California.
—
Kenny Choi, CBS News, 8 Apr. 2026
In addition, Ken is an Emmy-award winning broadcaster for Fox Sports’ MLB telecasts.
—Ken Rosenthal, New York Times, 8 Apr. 2026
On Day 3, however, an addition to the room remains on the table.
—Blair Kerkhoff, Kansas City Star, 8 Apr. 2026
Then came the additions of a few players that made the offense more dynamic, including running back Stephen Davis.
—Alex Zietlow, Charlotte Observer, 8 Apr. 2026
See All Example Sentences for addition
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Kenny Choi, CBS News, 8 Apr. 2026
In addition, Ken is an Emmy-award winning broadcaster for Fox Sports’ MLB telecasts.
—Ken Rosenthal, New York Times, 8 Apr. 2026
On Day 3, however, an addition to the room remains on the table.
—Blair Kerkhoff, Kansas City Star, 8 Apr. 2026
Then came the additions of a few players that made the offense more dynamic, including running back Stephen Davis.
—Alex Zietlow, Charlotte Observer, 8 Apr. 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 8 Apr. 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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