Amplifier

Noun

1. Anything that amplifies, or makes something larger or more intense.
2. An adverb that adds intensity, such as "really" or "totally".
3. An appliance or circuit that increases the strength of a weak electrical signal without changing the other characteristics of the signal.
4. A portable encasement that houses a large speaker, used to amplify voices and musical instruments at live performances.
5. A lens that enlarges the field of vision.