Wordnet 3.0
NOUN (1)
1.
electronic equipment that increases strength of signals passing through it;
The Collaborative International Dictionary of English v.0.48:
Amplifier \Am"pli*fi`er\, n.
One who or that which amplifies.
[1913 Webster]
WordNet (r) 3.0 (2006):
amplifier
n 1: electronic equipment that increases strength of signals
passing through it
Moby Thesaurus II by Grady Ward, 1.0:
46 Moby Thesaurus words for "amplifier":
attenuator, audio-frequency tube, ballast regulator, ballast tube,
beam-switching tube, convertor, current regulator, damper,
detector, discriminator, doubler, ear trumpet,
electronic hearing aid, focus tube, generator, hard-of-hearing aid,
hearing aid, iconoscope, inverter, limiter, local-oscillator tube,
megaphone, mixer tube, modulator, multiplier, multipurpose tube,
multivibrator, oscillator, output tube, phase inverter,
picture tube, power tube, preamp, preamplifier, pulse generator,
radio-frequency tube, receiving tube, rectifier tube, regulator,
repeater, speaking trumpet, stethoscope, transducer,
transistor hearing aid, trigger tube, vacuum-tube hearing aid