Quick definitions from WordNet (venture)

▸ noun:  any venturesome undertaking especially one with an uncertain outcome
▸ noun:  a commercial undertaking that risks a loss but promises a profit
▸ noun:  an investment that is very risky but could yield great profits
▸ verb:  proceed somewhere despite the risk of possible dangers ("We ventured into the world of high-tech and bought a supercomputer")
▸ verb:  put at risk
▸ verb:  put forward, of a guess, in spite of possible refutation
▸ name:  A surname (very rare: popularity rank in the U.S.: #53593)

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▸ Also see venture