Augmentation

augmentation
    n 1: the amount by which something increases
    2: the statement of a theme in notes of greater duration
       (usually twice the length of the original) [ant:
       {diminution}]
    3: the act of augmenting
    

Augmentation \Aug`men*ta"tion\, n. [LL. augmentatio: cf. F.
   augmentation.]
   1. The act or process of augmenting, or making larger, by
      addition, expansion, or dilation; increase.
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   2. The state of being augmented; enlargement.
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   3. The thing added by way of enlargement.
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   4. (Her.) A additional charge to a coat of arms, given as a
      mark of honor. --Cussans.
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   5. (Med.) The stage of a disease in which the symptoms go on
      increasing. --Dunglison.
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   6. (Mus.) In counterpoint and fugue, a repetition of the
      subject in tones of twice the original length.
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   {Augmentation court} (Eng. Hist.), a court erected by Stat.
      27 Hen. VIII., to augment the revenues of the crown by the
      suppression of monasteries. It was long ago dissolved.
      --Encyc. Brit.
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   Syn: Increase; enlargement; growth; extension; accession;
        addition.
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AUGMENTATION, old English law. The name of a court erected by Henry VIII.,
which was invested with the power of determining suits and controversies
relating to monasteries and abbey lands.
    

18 Moby Thesaurus words for "augmentation":
      accession, accretion, adjunct, annex, attachment, bonus, boot,
      complement, enhancement, enrichment, extra, fixture, increase,
      increment, plus, raise, reinforcement, rise