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[uhn-der-struhk-cher] /ˈʌn dərˌstrʌk tʃər/
a structure serving as a support; a base or foundation:
The building has a strong understructure.
any thing, condition, etc., establishing support; a basis:
an argument that rests on a sound understructure of knowledge.
Origin of understructure Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for understructure
  • The understructure of an airplane which supports the airplane on land or water: wheels, skis, or pontoons.
  • The resulting framework is welded to the semitrailer understructure.
  • Develop plan sheets, pertinent notes, understructure lighting and details.
  • The understructure contained copper gasoline tubing as well as the cop- per wiring attachments.

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