Simple Definition of substructure
: a supporting part or structure that is below something
Full Definition of substructure
: an underlying or supporting part of a structure
substructuralplay \-chə-rəl, -shrəl\ adjective
Examples of substructure in a sentence
The bridge's substructure was damaged.
First Known Use of substructure
Learn More about substructure
Britannica English: Translation of substructure for Arabic speakers
Seen and Heard
What made you want to look up substructure? Please tell us where you read or heard it (including the quote, if possible).