Definition of voussoir in US English:



  • A wedge-shaped or tapered stone used to construct an arch.

    • ‘It consists of little more than seven arches, diminishing in height away from the center, decorated with alternating projecting voussoirs.’
    • ‘At the underside of the sixth floor, the atrium narrows to a small opening encircled by polished granite voussoirs.’
    • ‘It has to be remembered that even repeated patterns round a window required different models for each side, as well as for the voussoirs, keystone, and stop-ends, each of which had to be specially drawn.’
    • ‘This tomb is notable because it introduced for the first time in India the principle of the true arch with radiating voussoirs.’
    • ‘Using stone salvaged from the exterior wall, a matching 6-foot voussoir was created in the north wall on Fifth Avenue.’


Early 18th century: via French from popular Latin volsorium, based on Latin volvere ‘to roll’. The word, borrowed from Old French, was also used for a time in late Middle English.