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English definition of “vault”

vault

noun [C] (ARCH)    /vɒlt/ US  /vɑːlt/
a type of arch that supports a roof or ceiling , especially in a church or public building , or a ceiling or roof supported by several of these arches Arches, columns and beams
(Definition of vault noun (ARCH) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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