The Collaborative International Dictionary of English v.0.48:

Net \Net\ (n[e^]t), n. [AS. net; akin to D. net, OS. net, netti,
   OHG. nezzi, G. netz, Icel. & Dan. net, Sw. n[aum]t, Goth.
   nati; of uncertain origin.]
   1. A fabric of twine, thread, or the like, wrought or woven
      into meshes, and used for catching fish, birds,
      butterflies, etc.
      [1913 Webster]

   2. Anything designed or fitted to entrap or catch; a snare;
      any device for catching and holding.
      [1913 Webster]

            A man that flattereth his neighbor spreadeth a net
            for his feet.                         --Prov. xxix.
                                                  5.
      [1913 Webster]

            In the church's net there are fishes good or bad.
                                                  --Jer. Taylor.
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   3. Anything wrought or woven in meshes; as, a net for the
      hair; a mosquito net; a tennis net.
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   4. (Geom.) A figure made up of a large number of straight
      lines or curves, which are connected at certain points and
      related to each other by some specified law.
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   5. A network. [informal]
      [PJC]

   6. Specifically: The internet; -- usually the net; as, I
      found it on the net. [slang]
      [PJC]