Source : Webster's Revised Unabridged Dictionary (1913)

Vest \Vest\, v. t. [imp. & p. p. {Vested}; p. pr. & vb. n.
   {Vesting}.] [Cf. L. vestire, vestitum, OF. vestir, F.
   v[^e]tir. See {Vest}, n.]
   1. To clothe with, or as with, a vestment, or garment; to
      dress; to robe; to cover, surround, or encompass closely.

            Came vested all in white, pure as her mind.
                                                  --Milton.

            With ether vested, and a purple sky.  --Dryden.

   2. To clothe with authority, power, or the like; to put in
      possession; to invest; to furnish; to endow; -- followed
      by with before the thing conferred; as, to vest a court
      with power to try cases of life and death.

            Had I been vested with the monarch's power. --Prior.

   3. To place or give into the possession or discretion of some
      person or authority; to commit to another; -- with in
      before the possessor; as, the power of life and death is
      vested in the king, or in the courts.

            Empire and dominion was [were] vested in him.
                                                  --Locke.

   4. To invest; to put; as, to vest money in goods, land, or
      houses. [R.]

   5. (Law) To clothe with possession; as, to vest a person with
      an estate; also, to give a person an immediate fixed right
      of present or future enjoyment of; as, an estate is vested
      in possession. --Bouvier.

Vested \Vest"ed\, a.
   1. Clothed; robed; wearing vestments. ``The vested priest.''
      --Milton.

   2. (Law) Not in a state of contingency or suspension; fixed;
      as, vested rights; vested interests.

   {Vested legacy} (Law), a legacy the right to which commences
      in pr[ae]senti, and does not depend on a contingency; as,
      a legacy to one to be paid when he attains to twenty-one
      years of age is a vested legacy, and if the legatee dies
      before the testator, his representative shall receive it.
      --Blackstone.

   {Vested remainder} (Law), an estate settled, to remain to a
      determined person, after the particular estate is spent.
      --Blackstone. --Kent.

Source : WordNet®

vested
     adj : fixed and absolute and without contingency; "a vested right"