amplifier
n. countable B2 Upper Intermediate US //ˈæmpɫəˌfaɪɝ// UK //ˈæmplɪfˌaɪə// am·pli·fi·er
n. a device that makes an electrical signal stronger. You use an amplifier to make music louder or to boost a weak signal.
n. an electronic device that increases the power, current, or voltage of a signal. Commonly used in audio equipment and telecommunications.
The amplifier makes the guitar sound louder.
She connected her laptop to the amplifier to hear the presentation clearly.
The vintage tube amplifier added a warm, rich texture to the recording that digital systems struggled to replicate.
From amplify + -er.