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.
Originally published as Jefferson's Big Deal: The Louisiana Purchase, in Monticello Newsletter, 14 (Spring 2003). Timeline of the Louisiana Territory 1682 RenÃ©-Robert Cavelier, Sieur de La Salle, claims for France all territory drained by Mississippi River from Canada to the Gulf of Mexico and names it Louisiana.