American Heritage Dictionary
(1)
Century Dictionary
(5)
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
On the contrary, these two releases were recorded by fans right from the soundboard - or at least 10.22.94 was.— DMB Headlines Courtesy of antsmarching.org
Notes: Mics immediately left of soundboard, 8 'high (front of balcony).— bt.etree.org
One shows a part of the soundboard which has cracked and come away from the sides.— Mandolin Cafe News
I can fill the cracks (there are a few) with spruce splints and reglue the soundboard, but because of shrinkage in the wood, the purfling will not line up again properly.— Mandolin Cafe News

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You can expect to see this word about twice a year.