The Collaborative International Dictionary of English v.0.48:

Vest \Vest\ (v[e^]st), n. [L. vestis a garment, vesture; akin to
   Goth. wasti, and E. wear: cf. F. veste. See Wear to carry
   on the person, and cf. Divest, Invest, Travesty.]
   [1913 Webster]
   1. An article of clothing covering the person; an outer
      garment; a vestment; a dress; a vesture; a robe.
      [1913 Webster]

            In state attended by her maiden train,
            Who bore the vests that holy rites require.
                                                  --Dryden.
      [1913 Webster]

   2. Any outer covering; array; garb.
      [1913 Webster]

            Not seldom clothed in radiant vest
            Deceitfully goes forth the morn.      --Wordsworth.
      [1913 Webster]

   3. Specifically, a waistcoat, or sleeveless body garment, for
      men, worn under the coat.
      [1913 Webster]

   Syn: Garment; vesture; dress; robe; vestment; waistcoat.

   Usage: Vest, Waistcoat. In England, the original word
          waistcoat is generally used for the body garment worn
          over the shirt and immediately under the coat. In the
          United States this garment is commonly called a vest,
          and the waistcoat is often improperly given to an
          under-garment.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vest \Vest\ (v[e^]st), v. i.
   To come or descend; to be fixed; to take effect, as a title
   or right; -- followed by in; as, upon the death of the
   ancestor, the estate, or the right to the estate, vests in
   the heir at law.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

            Came vested all in white, pure as her mind.
                                                  --Milton.
      [1913 Webster]

            With ether vested, and a purple sky.  --Dryden.
      [1913 Webster]

   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.
      [1913 Webster]

            Had I been vested with the monarch's power. --Prior.
      [1913 Webster]

   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.
      [1913 Webster]

            Empire and dominion was [were] vested in him.
                                                  --Locke.
      [1913 Webster]

   4. To invest; to put; as, to vest money in goods, land, or
      houses. [R.]
      [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

vest
    n 1: a man's sleeveless garment worn underneath a coat [syn:
         vest, waistcoat]
    2: a collarless men's undergarment for the upper part of the
       body [syn: singlet, vest, undershirt]
    v 1: provide with power and authority; "They vested the council
         with special rights" [syn: invest, vest, enthrone]
         [ant: disinvest, divest]
    2: place (authority, property, or rights) in the control of a
       person or group of persons; "She vested her vast fortune in
       her two sons"
    3: become legally vested; "The property vests in the trustees"
    4: clothe oneself in ecclesiastical garments
    5: clothe formally; especially in ecclesiastical robes [syn:
       vest, robe]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "vest":
   appertain, appertain to, authorize, base, belong to, bless with,
   build, build in, dower, empower, endow, endow with, establish,
   favor with, fix, found, grace with, ground, install, invest,
   lay the foundation, pertain, pertain to, pitch, plant, put in,
   put up, seat, set, set up, settle on, settle upon, vest in,
   vest with, waistcoat



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

VEST
       VAX Environment Software Translator (VAX, DEC)