The Collaborative International Dictionary of English v.0.48:

fingerboard \fingerboard\ n.
   1. a guidepost resembling a hand with a pointing index
      finger.

   Syn: fingerpost.
        [WordNet 1.5]

   2. a bank of keys on a musical instrument.

   Syn: piano keyboard, clavier.
        [WordNet 1.5]

   3. a narrow strip of wood on the neck of some stringed
      instruments (violin or cello or guitar etc) where the
      strings are held against the wood with the fingers.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

fingerboard
    n 1: a guidepost resembling a hand with a pointing index finger
         [syn: fingerpost, fingerboard]
    2: a bank of keys on a musical instrument [syn: piano
       keyboard, fingerboard, clavier]
    3: a narrow strip of wood on the neck of some stringed
       instruments (violin or cello or guitar etc) where the strings
       are held against the wood with the fingers