[n] (electricity) the act of increasing voltage or power or current
[n] addition of extra material or illustration or clarifying detail; "a few remarks added in amplification and defense"; "an elaboration of the idea followed"
[n] the amount of increase in signal power or voltage or current expressed as the ratio of output to input
\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.