The Collaborative International Dictionary of English v.0.48:

Hay \Hay\ (h[=a]), n. [AS. hege: cf. F. haie, of German origin.
   See Haw a hedge, Hedge.]
   1. A hedge. [Obs.]
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   2. A net set around the haunt of an animal, especially of a
      rabbit. --Rowe.
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   To dance the hay, to dance in a ring. --Shak.
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