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

Phrases

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

• annex
• extension
• penthouse

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 the Panthers problems, Dr. Bob Sports notes in the Saints-Cowboys Week 2 matchup that the Cowboys defense had 17 quarterback hits in defensive coordinator Mike Zimmer’s first game in charge which was more than any team had in a game last season. —Jay Ginsbach, Forbes, 13 Sep. 2024

In addition to one-touch coffee and espresso brewing, the user-friendly machine has three different one-touch buttons for making cappuccino, latte macchiato, and hot foam. —Terri Williams, Architectural Digest, 13 Sep. 2024

The game will air in Southern California on CBS and Paramount+ in addition to NFL Sunday Ticket on YouTube TV. —Thuc Nhi Nguyen, Los Angeles Times, 13 Sep. 2024

In addition to reaching her 283 million followers with her Instagram post, the locations selected for the Swift ads are two of the biggest tourist spots in the country. —Jackie Strause, The Hollywood Reporter, 13 Sep. 2024

Word History

Etymology

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

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing addition

• in addition
• in addition to

Kids 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)