1. [n]  the act of jumping over an obstacle
2. [n]  an arched brick or stone ceiling or roof
3. [n]  a burial chamber (usually underground)
4. [n]  a strongroom or compartment (often made of steel) for safekeeping of valuables
5. [v]  bound vigorously
6. [v]  jump across or leap over (an obstacle)

Vault
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1. \Vault\ (v[add]lt; see Note, below), n. [OE. voute, OF.
   voute, volte, F. vo[^u]te, LL. volta, for voluta, volutio,
   fr. L. volvere, volutum, to roll, to turn about. See
   {Voluble}, and cf. {Vault} a leap, {Volt} a turn, {Volute}.]
   1. (Arch.) An arched structure of masonry, forming a ceiling
      or canopy.
            The long-drawn aisle and fretted vault. --Gray.
   2. An arched apartment; especially, a subterranean room, use
      for storing articles, for a prison, for interment, or the
      like; a cell; a cellar. ``Charnel vaults.'' --Milton.
            The silent vaults of death.           --Sandys.
            To banish rats that haunt our vault.  --Swift.
   3. The canopy of heaven; the sky.
            That heaven's vault should crack.     --Shak.
   4. [F. volte, It. volta, originally, a turn, and the same
      word as volta an arch. See the Etymology above.] A leap or
      bound. Specifically:
      (a) (Man.) The bound or leap of a horse; a curvet.
      (b) A leap by aid of the hands, or of a pole, springboard,
          or the like.
   Note: The l in this word was formerly often suppressed in
         pronunciation.
   {Barrel}, {Cradle}, {Cylindrical}, or {Wagon}, {vault}
      (Arch.), a kind of vault having two parallel abutments,
      and the same section or profile at all points. It may be
      rampant, as over a staircase (see {Rampant vault}, under
      {Rampant}), or curved in plan, as around the apse of a
      church.
   {Coved vault}. (Arch.) See under 1st {Cove}, v. t.
   {Groined vault} (Arch.), a vault having groins, that is, one
      in which different cylindrical surfaces intersect one
      another, as distinguished from a barrel, or wagon, vault.
   {Rampant vault}. (Arch.) See under {Rampant}.
   {Ribbed vault} (Arch.), a vault differing from others in
      having solid ribs which bear the weight of the vaulted
      surface. True Gothic vaults are of this character.
   {Vault light}, a partly glazed plate inserted in a pavement
      or ceiling to admit light to a vault below.
   

2. \Vault\, v. t. [imp. & p. p. {Vaulted}; p. pr. & vb. n.
   {Vaulting}.] [OE. vouten, OF. volter, vouter, F. vo[^u]ter.
   See {Vault} an arch.]
   1. To form with a vault, or to cover with a vault; to give
      the shape of an arch to; to arch; as, vault a roof; to
      vault a passage to a court.
            The shady arch that vaulted the broad green alley.
                                                  --Sir W.
                                                  Scott.
   2. [See {Vault}, v. i.] To leap over; esp., to leap over by
      aid of the hands or a pole; as, to vault a fence.
            I will vault credit, and affect high pleasures.
                                                  --Webster
                                                  (1623).
   

3. \Vault\, v. i. [Cf. OF. volter, F. voltiger, It. volt?re
   turn. See {Vault}, n., 4.]
   1. To leap; to bound; to jump; to spring.
            Vaulting ambition, which o'erleaps itself. --Shak.
            Leaning on his lance, he vaulted on a tree.
                                                  --Dryden.
            Lucan vaulted upon Pegasus with all the heat and
            intrepidity of youth.                 --Addison.
   2. To exhibit feats of tumbling or leaping; to tumble.