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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. 2016.
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Examples from the Web for understructure
Historical Examples
  • The hair at the back of his neck lifted as his understructure raked across the hatch cover of the Jerry.

    A Yankee Flier with the R.A.F. Rutherford G. Montgomery
  • And I confess that at this close view of the understructure of a polygamous career, I was weak enough to feel scandalized.

  • By the June of that year the understructure of the Pier was finished, and the rest was advancing with the speed of paper-hanging.

    Mushroom Town Oliver Onions
  • Stan saw a Liberator smack into a bursting shell that exploded against her understructure.

    A Yankee Flier with the R.A.F. Rutherford G. Montgomery

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