The Collaborative International Dictionary of English v.0.48:

Harbor \Har"bor\ (h[aum]r"b[~e]r), n. [Written also harbour.]
   [OE. herbor, herberwe, herberge, Icel. herbergi (cf. OHG.
   heriberga), orig., a shelter for soldiers; herr army + bjarga
   to save, help, defend; akin to AS. here army, G. heer, OHG.
   heri, Goth. harjis, and AS. beorgan to save, shelter, defend,
   G. bergen. See Harry, 2d Bury, and cf. Harbinger.]
   1. A station for rest and entertainment; a place of security
      and comfort; a refuge; a shelter.
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            [A grove] fair harbour that them seems. --Spenser.
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            For harbor at a thousand doors they knocked.
                                                  --Dryden.
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   2. Specif.: A lodging place; an inn. [Obs.] --Chaucer.
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   3. (Astrol.) The mansion of a heavenly body. [Obs.]
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   4. A portion of a sea, a lake, or other large body of water,
      either landlocked or artificially protected so as to be a
      place of safety for vessels in stormy weather; a port or
      haven.
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   5. (Glass Works) A mixing box for materials.
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   Harbor dues (Naut.), fees paid for the use of a harbor.

   Harbor seal (Zool.), the common seal.

   Harbor watch, a watch set when a vessel is in port; an
      anchor watch.
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