The Collaborative International Dictionary of English v.0.48:

Wand \Wand\, n. [Of Scand. origin; cf. Icel. v["o]ndr, akin to
   Dan. vaand, Goth. wandus; perhaps originally, a pliant twig,
   and akin to E. wind to turn.]
   1. A small stick; a rod; a verge.
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            With good smart blows of a wand on his back.
                                                  --Locke.
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   2. Specifically:
      (a) A staff of authority.
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                Though he had both spurs and wand, they seemed
                rather marks of sovereignty than instruments of
                punishment.                       --Sir P.
                                                  Sidney.
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      (b) A rod used by conjurers, diviners, magicians, etc.
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                Picus bore a buckler in his hand;
                His other waved a long divining wand. --Dryden.
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   Wand of peace (Scots Law), a wand, or staff, carried by the
      messenger of a court, which he breaks when deforced (that
      is, hindered from executing process), as a symbol of the
      deforcement, and protest for remedy of law. --Burrill.
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