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Latin substructio, from substruere, substructum, to build beneath; sub under + struere to build.


substruction (plural substructions)

  1. (architecture) underbuilding; the foundation, or any preliminary structure intended to raise the lower floor or basement of a building above the natural level of the ground.
    • Evelyn
      It is a magnificent strong building, with a substruction very remarkable.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.