amplification (
http://definr.com/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: (electricity) the act of increasing voltage or power or
current