amplification
1. [ noun ] addition of extra material or illustration or clarifying detail
Synonyms: elaboration
Examples:

: "a few remarks added in amplification and defense" "an elaboration of the idea followed"

Related terms: expansion elaborate
2. [ noun ] the amount of increase in signal power or voltage or current expressed as the ratio of output to input
Synonyms: gain
Related terms: increase loop_gain
3. [ noun ] (electricity) the act of increasing voltage or power or current
Related terms: increase electricity