[ uhn-der-struhk-cher ]
/ ˈʌn dərˌstrʌk tʃər /
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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.
Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.
Question 1 of 7
“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

Origin of understructure

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use understructure in a sentence

  • 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
  • And I confess that at this close view of the understructure of a polygamous career, I was weak enough to feel scandalized.

  • 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
  • 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