amplifier - WordReference.com Dictionary of English

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- - amphipod
  - amphiprostyle
  - amphisbaena
  - amphitheatre
  - amphiuma
  - amphora
  - amphoteric
  - ampicillin
  - ample
  - amplexus
  - amplifier
  - amplify
  - amplitude
  - amplitude modulation
  - ampoule
  - ampulla
  - amputate
  - amputee
  - AMRAAM
  - amrit
  - amtrac
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amplifier

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Concise Oxford English Dictionary © 2008 Oxford University Press:
amplifier/ˈamplɪfʌɪə(r)/

▶noun

1 an electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction.

2 a device of this kind combined with a loudspeaker, used to amplify electric guitars and other musical instruments.

'amplifier' also found in these Oxford entries:

amp - amplify - bi-wiring - cab - combo - crystal set - feedback - frequency response - gain - hum - op-amp - operational amplifier - overdrive - preamplifier - reverb - tuner

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