1. To make larger or more powerful; to increase: "The administrator must amplify his efforts to get his staff to produce better results."

"The microphone amplified the singer's voice."

"The psychologist maintains that technology exists to complement and to amplify the human mind."

"The amplified music was so loud that Jim couldn't hear what Trudy was saying."

2. To add to, as with illustrations; to make complete: "The speaker was asked to amplify his remarks by giving the audience some examples."
3. To exaggerate: "The radio talk-show host always amplifies the evils of his political opposition and minimizes any negative aspects of his preferred political group."
4. To increase electrical signals: "The technician was working to amplify the transmission, storage, and manipulation of information for the company's computers."

A rapid method for detecting variations in DNA sequences between individuals, using the polymerase chain reaction technique which involves a process in molecular genetics that permits the analysis of any short sequence of DNA (or RNA) even in samples that contain exceptionally small quantities of DNA or RNA.