Legal Definition of vested. 1  1 : fully and absolutely established as a right, benefit, or privilege : not dependent on any contingency or condition; specifically : not subject to forfeiture if employment terminates before retirement vested pension benefits. 2  2 : having a vested interest a vested employee a vested beneficiary.
Thomas Jefferson was the President when the Louisiana Purchase  transaction was negotiated. The people who actually signed the  Purchase Treaty were James Monroe, Robert Liv â¦ ingston, and Barbe  Marbois.
History & Culture. The Louisiana Purchase was one of the largest land deals in history. In 1803, the United States paid approximately $15 million dollars for France for over 800,000 square miles of land. This land deal was arguably the greatest achievement of Thomas Jefferson's presidency but also posed a major philosophical problem for Jefferson.