The Collaborative International Dictionary of English v.0.48:

Clavier \Cla"vi*er\ (? F. ?), n. [F., fr. L. clavis key.] (Mus.)
   The keyboard of an organ, pianoforte, or harmonium.
   [1913 Webster]

   Note: Clavier (?) is the German name for a pianoforte.
         [1913 Webster]

WordNet (r) 3.0 (2006):

clavier
    n 1: a bank of keys on a musical instrument [syn: piano
         keyboard, fingerboard, clavier]
    2: a stringed instrument that has a keyboard [syn: clavier,
       Klavier]