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   addition

   /əˈdɪʃn/

   noun

   • 1. the action or process of adding something to something else: "the hotel has been extended with the addition of more rooms" Similar inclusionaddingadding inincorporationintroductioninsertion
   • ▪ a person or thing added or joined: "you will find the coat a useful addition to your wardrobe" Similar supplementappendageadjunctaddendumadd-onextraaccompanimentextensionriderincreaseincrementaugmentation
   • 2. the process of calculating the total of two or more numbers or amounts: "she began with simple arithmetic, addition and then subtraction" Similar adding upcountingtotallingcomputationcalculationreckoningtallyingsummationinformal:totting upinformal, dated:casting up
   • ▪ the process of combining matrices, vectors, or other quantities under specific rules to obtain their sum or resultant: "the concepts of vectors and vector addition"

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

   Scrabble Points: 10

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