soffit

[ sof-it ]
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nounArchitecture.
  1. the underside of an architectural feature, as a beam, arch, ceiling, vault, or cornice.

Origin of soffit

1
1605–15; <French soffite<Italian soffitto<Vulgar Latin *suffīctus, for Latin suffīxus;see suffix

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British Dictionary definitions for soffit

soffit

/ (ˈsɒfɪt) /


noun
  1. the underside of a part of a building or a structural component, such as an arch, beam, stair, etc

  2. Also called: crown, vertex the upper inner surface of a drain or sewer: Compare invert (def. 6)

Origin of soffit

1
C17: via French from Italian soffitto, from Latin suffixus something fixed underneath, from suffīgere, from sub- under + fīgere to fasten

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