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"arched roof or ceiling," c.1300, vaute, from Old French voute "arch, vaulted roof," from Vulgar Latin *volta, contraction of *volvita, noun use of fem. of *volvitus, alteration of Latin volutus "bowed, arched," past participle of volvere "to turn, turn around, roll" (see volvox). The -l- appeared in English c.1400.
"a leap," 1763, from vault (v.).
"jump or leap over," 1530s (implied in vaulting), from Middle French volter "to gambol, leap," from Italian voltare "to turn," from Vulgar Latin *volvitare "to turn, leap," frequentative of Latin volvere "to turn, turn around, roll" (see volvox). Related: Vaulted; vaulting.