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in addition

 - 2 dictionary results
ad·di·tion   (ə-dĭsh'ən)   
n.  
  1. The act or process of adding, especially the process of computing with sets of numbers so as to find their sum.

  2. Something added, such as a room or section appended to a building.


[Middle English, from Old French, from Latin additiō, additiōn-, from additus, past participle of addere, to add; see add.]
ad·di'tion·al adj., ad·di'tion·al·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Idioms & Phrases

in addition

  1. Also, as well as. For example, They study their instruments and, in addition, theory and music history.

  2. in addition to. Over and above, besides, as in In addition to a new muffler, the truck needs new brakes. [c. 1900]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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