The Collaborative International Dictionary of English v.0.48:

Venture \Ven"ture\, v. i. [imp. & p. p. Ventured; p. pr. & vb.
   n. Venturing.]
   1. To hazard one's self; to have the courage or presumption
      to do, undertake, or say something; to dare. --Bunyan.
      [1913 Webster]

   2. To make a venture; to run a hazard or risk; to take the
      chances.
      [1913 Webster]

            Who freights a ship to venture on the seas. --J.
                                                  Dryden, Jr.
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   To venture at, or To venture on or To venture upon, to
      dare to engage in; to attempt without any certainty of
      success; as, it is rash to venture upon such a project.
      "When I venture at the comic style." --Waller.
      [1913 Webster]