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noun sound·board \ˈsau̇n(d)-ˌbȯrd\

Definition of soundboard

  1. 1 :  a thin resonant board (as the belly of a violin) so placed in an instrument as to reinforce its tones by sympathetic vibration — see violin illustration

  2. 2 :  sounding board 1a

  3. 3 usually sound board :  sound card

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