"amplification" in the noun sense
1. amplification, elaboration
addition of extra material or illustration or clarifying detail
"a few remarks added in amplification and defense"
"an elaboration of the sketch followed"
2. amplification, gain
the amount of increase in signal power or voltage or current expressed as the ratio of output to input
3. amplification
electronics) the act of increasing voltage or power or current
Source: WordNet® (An amazing lexical database of English)
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