Source : Webster's Revised Unabridged Dictionary (1913)

Vaulter \Vault"er\, n.
   One who vaults; a leaper; a tumbler. --B. Jonson.

Source : WordNet®

vaulter
     n : an athlete who jumps over a high crossbar with the aid of a
         long pole [syn: {pole vaulter}, {pole jumper}]