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| ad·di·tion [ ə dísh'n ] (plural ad·di·tions) |
noun |
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| Definition: |
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1. putting in or on: the act of adding something onto or into something else
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2. added person or thing: somebody or something that is added
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3. mathematics calculation: the process of calculating the sum of two or more numbers or amounts
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4. buildings annex: a part added to a building
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5. chemistry chemical reaction: a chemical reaction in which two or more compounds combine to produce a new compound
  an addition-type reaction
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| [14th century. Directly or via French< Latin addition-< additus, past participle of addere (see add)] |
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in addition
1. used to introduce an additional point or relevant fact
2. also
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in addition to as well as
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