Source : Webster's Revised Unabridged Dictionary (1913)

Amplification \Am`pli*fi*ca"tion\, n. [L. amplificatio.]
   1. The act of amplifying or enlarging in dimensions;
      enlargement; extension.

   2. (Rhet.) The enlarging of a simple statement by
      particularity of description, the use of epithets, etc.,
      for rhetorical effect; diffuse narrative or description,
      or a dilating upon all the particulars of a subject.

            Exaggeration is a species of amplification. --Brande
                                                  & C.

            I shall summarily, without any amplification at all,
            show in what manner defects have been supplied.
                                                  --Sir J.
                                                  Davies.

   3. The matter by which a statement is amplified; as, the
      subject was presented without amplifications.

Source : WordNet®

amplification
     n 1: addition of extra material or illustration or clarifying
          detail; "a few remarks added in amplification and
          defense"; "an elaboration of the idea followed" [syn: {elaboration}]
     2: the amount of increase in signal power or voltage or current
        expressed as the ratio of output to input [syn: {gain}]
     3: (electronics) the act of increasing voltage or power or
        current