Definition: Amplification refers to a literary practice where the writer embellishes the sentence by adding more information to it in order to increase its worth and understandability. When a plain sentence is too abrupt and fails to convey the full details of what is wanting to be said, amplification comes into play when the writer adds more to the structure to give it more meaning. Amplification usually involves embellishment but more information is always being added.
Example: Original sentence- The thesis paper was difficult. After amplification- The thesis paper was difficult: it required extensive research, data collection, sample surveys, interviews and a lot of fieldwork.
This painting shows amplification because the face before is missing features but after more detail is added making it a better painting. The same goes for a plain sentences missing detail but once amplification is used there is more detail.