The Collaborative International Dictionary of English v.0.48:

Harp \Harp\ (h[aum]rp), n. [OE. harpe, AS. hearpe; akin to D.
   harp, G. harfe, OHG. harpha, Dan. harpe, Icel. & Sw. harpa.]
   1. A musical instrument consisting of a triangular frame
      furnished with strings and sometimes with pedals, held
      upright, and played with the fingers.
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   2. (Astron.) A constellation; Lyra, or the Lyre.
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   3. A grain sieve. [Scot.]
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   Aeolian harp. See under Aeolian.
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   Harp seal (Zool.), an arctic seal (Phoca Gr[oe]nlandica).
      The adult males have a light-colored body, with a
      harp-shaped mark of black on each side, and the face and
      throat black. Called also saddler, and saddleback. The
      immature ones are called bluesides; their fur is white,
      and they are killed and skinned to harvest the fur.

   Harp shell (Zool.), a beautiful marine gastropod shell of
      the genus Harpa, of several species, found in tropical
      seas. See Harpa.
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WordNet (r) 3.0 (2006):

harp seal
    n 1: common Arctic seal; the young are all white [syn: harp
         seal, Pagophilus groenlandicus]