amplifier
Definitions
An electronic device that increases the power, voltage, or current of a signal.
A person or thing that amplifies, expands, or enlarges something.
Examples
The guitarist plugged his electric instrument into a powerful amplifier to ensure the sound filled the entire concert hall.
The new signal amplifier significantly improved the clarity and range of our home Wi-Fi connection.
Synonyms
booster intensifier magnifier augmenter enhancer preamplifier