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addition

UK/əˈdɪʃ.ən/US/əˈdɪʃ.ən/
nounB1Common in everyday speech and writing · #2,855 of 15,258mostly written

Other forms: additions

An addition is something added, or the joining of numbers together. A recent addition, in addition to, learn addition.

In addition to is the commonest use of all and is simply a formal way of saying as well as. Of a family, a new addition is a baby, and in building an addition is what Britain calls an extension.

Maksim · CC BY-SA 3.0

Definitions of addition

  1. 1nounadditionSomething added, or the joining of numbers together.B1

    “The new baby is the latest addition to the family.”

addition is a thing added.

Where it comes from

Latin additio comes from addere, to add, from ad plus dare, to give.

  1. Proto-Indo-European

    *deh₃-

  2. Old French

    adition

  3. Middle English

    addicioun

  4. English, today

    addition

Built from

  • addō · Latin — add, put

From Middle English addicioun, from Old French adition. Sense of “what is added” dates from 14th century, from Middle English addicioun, addition, from Old French adition, from Latin additiōnem, accusative singular of additiō, from addō (“add, put”).

Etymology from Wiktionary, CC BY-SA

Practise this word

addition in the wild

  • The addition of two whole numbers results in the total or sum of those values combined.

    Addition

  • Repeated addition of 1 is the same as counting (see Successor function).

    Addition

  • In organic chemistry, Markovnikov's rule or Markownikoff's rule describes the outcome of some addition reactions.

    Markovnikov's rule

  • An addition reaction is limited to chemical compounds that have multiple bonds.

    Addition reaction

  • For example, addition on real numbers is an operation that accepts two real numbers and returns a real number.

    Operation (mathematics)

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From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.

From Project Gutenberg, public domain. These sentences are from real books, shown to illustrate the word at work.

Related words

the addō family

addaddition

addition — used about once every 429 pages · #2,855 · point at the bar for the others

  • additional
  • additionally