Definition of addition in English:


(also addn.)


  • 1The action or process of adding something to something else.

    ‘the hotel has been extended with the addition of more rooms’
    • ‘The town of Belmullet looks splendid and bright with the addition of new lights.’
    • ‘In the kitchen, a truly rural feel is added to the kitchen with the addition of a solid-fuel Aga.’
    • ‘Turkey and the trimmings can be improved dramatically with the addition of a well chosen wine accompaniment.’
    • ‘The colour range favours warm and tropical colours, with the addition of blue and sea green.’
    • ‘Division two saw the usual suspects duelling it out with the addition of some new faces.’
    • ‘It can work on hair that is fine or thin with the addition of hair pieces or extensions.’
    • ‘With the addition of a few commas and the striking out of the one paragraph, the deal already on the table will finally go through.’
    • ‘A wakeboard is similar in shape to a snowboard, with the addition of two small fins on the underside.’
    • ‘This is not the case these days; with the addition of violence, things have turned a bit uglier.’
    • ‘Bolton's nightlife is due to expand again with the addition of another trendy wine bar.’
    • ‘A community transport scheme has been given a major boost with the addition of an extra vehicle.’
    • ‘The camera obscura box reproduced these conditions and clarified the images with the addition of a lens.’
    • ‘The garden will continue to be developed in the future with the addition of an aromatic walkway planned for next year.’
    • ‘The sweltering conditions will run into the middle of next week with the addition of the odd thunderstorm.’
    • ‘This classic snack can be varied with the addition of thinly sliced smoked chicken or turkey and avocado.’
    • ‘You can make them more formal with the addition of a diamanté brooch to use as a clasp on the front or the back.’
    • ‘The new year has brought some dramatic changes at the loch with the addition of three new fisheries.’
    • ‘Make old timber look new with the addition of vinegar and blasting it with a blowtorch.’
    • ‘At a later stage they were subsequently sold as Van Goghs, occasionally with the addition of a false signature.’
    • ‘It was tender, juicy and tasty, especially with the addition of the salty pork wrapping.’
    inclusion, adding, adding in, incorporation, introduction, insertion
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    1. 1.1A person or thing added or joined, typically in order to improve something.
      ‘you will find the coat a useful addition to your wardrobe’
      • ‘Other new additions include a search facility from Google and an expanded links section.’
      • ‘Apart from taking up the renovation works, a few additions have been made in the premises.’
      • ‘Students will not have to pay for these additions until we begin to use the facilities.’
      • ‘We'll be watching forthcoming additions to Guardian Unlimited with interest.’
      • ‘But they have spent wisely and have made a lot of good additions to their squad.’
      • ‘See all the new additions to the city skyline in our picture gallery.’
      • ‘There seemed to be more extended scenes rather than whole new scenes but there were one or two excellent new additions.’
      • ‘While both look to be excellent additions, it remains to be seen whether or not this season will be as memorable as the last.’
      • ‘They too have a number of big additions to their side from last year in attack.’
      • ‘There are lots of new additions showcased and you're sure to find something interesting.’
      • ‘A stationary shop in George Street has been branching out with some unusual additions to its stock.’
      • ‘But opposition councillors found a number of unexplained additions in the report.’
      • ‘A survival course is one of the latest additions to the club's list of extreme sports.’
      • ‘With many riders returning, there are also many new promising additions to the club.’
      • ‘This is the same encyclopedia, with multimedia additions, that used to take up a huge bookshelf.’
      • ‘The new additions to the gameplay and this new story keep me up till way past my bedtime.’
      • ‘The new design was intended to create more internal space, which meant stripping away the additions at the back.’
      • ‘Even beetroot and spinach can be rendered palatable with a little juicing and some judicious additions.’
      • ‘There will also be several additions to teaching programs in the faculty of education.’
      • ‘The intention is to add more tours to the database each year so that visitors will be able to return and catch up on the latest additions.’
      supplement, appendage, adjunct, addendum, add-on, extra, accompaniment, extension, rider
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  • 2The process or skill of calculating the total of two or more numbers or amounts.

    ‘she began with simple arithmetic, addition and then subtraction’
    • ‘Such a machine would be able to carry out complex operations using only the mechanism for addition.’
    • ‘The only way is up - addition works in three dimensions but what about multiplication?’
    • ‘The Count Hoot section of the site helps with addition and subtraction as well.’
    • ‘They are great at the game of subtraction, when the game of parliamentary politics is addition.’
    • ‘That is addition, multiplication and the two inverse operations of subtraction and division.’
    • ‘She showed that babies can even do addition and subtraction, of a rudimentary sort.’
    • ‘In this addition sum each letter represents a digit, different letters being different digits.’
    • ‘The addition of three points to his team's total is a minor calculation.’
    • ‘To see the sort of difficulty that can arise, let us consider addition first.’
    • ‘Yet addition and also subtraction are only an extension of counting.’
    • ‘As one might expect, multiplication of infinite decimals is more complicated than addition.’
    • ‘Our old maths teacher was teaching addition to the kids and she asked us to look on as she went along with her class.’
    • ‘If the slip is accompanied by a number of items, the payee's addition of the sums is verified.’
    • ‘That's likely a trace to the way many of us learned to count and do basic addition.’
    • ‘Basically they had to devise methods of multiplication and division which only involved addition.’
    adding up, counting, totalling, computation, calculation, reckoning, tallying, summation
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    1. 2.1Mathematics The process of combining matrices, vectors, or other quantities under specific rules to obtain their sum.
      • ‘We were reviewing vector addition this evening at a study session.’
      • ‘If you want to know the total force which is exerted on the body, you have to carry out a vector addition.’
      • ‘This suggests that Component 3 is not a vector addition but could be a single component.’
      • ‘We have now defined two operations for matrices, addition and multiplication.’
      • ‘Superimposing the two logical operations we can define binary addition.’


Late Middle English: from Latin additio(n-), from the verb addere (see add).