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ad⋅di⋅tion⋅al

[uh-dish-uh-nl]
–adjective
added; more; supplementary: additional information.

Origin:
1630–40; addition + -al 1


ad⋅di⋅tion⋅al⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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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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