Definition of addition noun from the Oxford Advanced Learner's Dictionary

      

    addition

     noun
    noun
    BrE BrE//əˈdɪʃn//
     
    ; NAmE NAmE//əˈdɪʃn//
     
     
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  1. 1   [uncountable] the process of adding two or more numbers together to find their total children learning addition and subtraction opposite subtraction
  2. 2  [countable] addition (to something) a thing that is added to something else the latest addition to our range of cars an addition to the family (= another child) last minute additions to the government’s package of proposals
  3. 3  [uncountable] addition (of something) the act of adding something to something else Pasta's basic ingredients are flour and water, sometimes with the addition of eggs or oil.
  4. 4(North American English) (British English extension) [countable] addition (to something) a new part that is added to a building architects who specialize in home additions The addition should match the architecture of the house.
  5. Word Origin late Middle English: from Latin additio(n-), from the verb addere, from ad- ‘to’ + the base of dare ‘put’. Extra examplesHe worked it out through simple addition. She can do addition, but she hasn’t learned subtraction yet. We have made several additions to the collection recently. a 22 000-square-foot addition designed by a Japanese architect a family-room addition to his home the latest addition to the familyIdioms
    in addition (to somebody/something)
     
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     used when you want to mention another person or thing after something else In addition to these arrangements, extra ambulances will be on duty until midnight. There is, in addition, one further point to make. Language BankadditionAdding another item Bilingual children do better in IQ tests than children who speak only one language. In addition/What is more, they seem to find it easier to learn third or even fourth languages. Learning another language not only improves children’s job prospects in later life, but also boosts their self-esteem. Teaching children a second language improves their job prospects in later life. Other benefits include increased self-esteem and greater tolerance of other cultures. Another/One further/One additional reason for encouraging bilingual education is that it boosts children’s self-esteem. Studies suggest that bilingual children find it easier to learn additional languages. There is, moreover, increasing evidence that bilingual children perform better across a range of school subjects, not just foreign languages. His claim that children find bilingual education confusing is based on very little evidence. Moreover, the evidence he does provide is seriously flawed. Research has shown that first-language development is not impeded by exposure to a second language. Furthermore, there is no evidence to support the claim that children find bilingual education confusing.
See the Oxford Advanced American Dictionary entry: addition

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