ad·​di·​tion | \ ə-ˈdi-shən How to pronounce addition (audio) , a- \

Definition of addition

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
in addition
: besides entry 2, also The job requires a college degree and, in addition, at least two years of experience.
in addition to
: combined or associated with : besides entry 1 sense 2 In addition to soup, several salads were served.

Synonyms for addition


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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 Michigan, 10 areas had the largest increases in their averages: Ohio, Washington, D.C., Pennsylvania, New Jersey, Connecticut, West Virginia, Indiana, North Carolina and Vermont. Frank Witsil, Detroit Free Press, 6 May 2022 In addition to high inflation and rising interest rates, investors are grappling with uncertainty over lingering supply chain disruptions and geopolitical tensions. Arkansas Online, 6 May 2022 In addition to featuring vegan formulas, each polish shade and top coat from the brand is also 9-Free. Tiffany Dodson, Harper's BAZAAR, 6 May 2022 The Naperville Liquor Commission Thursday recommended the Naperville City Council amend regulations on the sale of alcohol at live performances to include spirits in addition to wine and beer. Suzanne Baker, Chicago Tribune, 6 May 2022 That the police board was rejected, in addition to the phone call during which allegations of side meetings took place, led Kennedy to step away. Ted Glanzer, Hartford Courant, 6 May 2022 In addition to seeing her own therapist, Sumpter and James go to couples therapy every week as well. L'oreal Thompson Payton, SELF, 6 May 2022 In addition to the CDC briefing, researchers with the UK Health Security Agency on Friday posted a new technical briefing with an update on its hepatitis investigation. Brenda Goodman, CNN, 6 May 2022 In addition to being a skill that's highly valued in the workforce, coding teaches people how to work more efficiently and logically. Corinne Sullivan, Woman's Day, 6 May 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'addition.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of addition

14th century, in the meaning defined at sense 1

History and Etymology for addition

Middle English addicioun, borrowed from Anglo-French addicion, borrowed from Latin additiōn-, additiō, from addi-, variant stem of addere "to add" + -tiōn-, -tiō, suffix of action nouns

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Time Traveler for addition

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The first known use of addition was in the 14th century

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Dictionary Entries Near addition



addition agent

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Statistics for addition

Last Updated

9 May 2022

Cite this Entry

“Addition.” Dictionary, Merriam-Webster, Accessed 17 May. 2022.

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More Definitions for addition


ad·​di·​tion | \ ə-ˈdi-shən How to pronounce addition (audio) \

Kids Definition of addition

1 : the act or process of adding numbers to obtain their sum
2 : something added an addition to a house
in addition
: as something more
in addition to
: along with or together with There was ice cream in addition to cake and pie.

More from Merriam-Webster on addition

Nglish: Translation of addition for Spanish Speakers

Britannica English: Translation of addition for Arabic Speakers Encyclopedia article about addition


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