Understructure

noun

noun ·Uncommon ·Advanced level

Definitions

Noun

1
The supporting structure underneath something, such as a vehicle or bridge.
"Holonym: infrastructure (facilities sense)"
2
lowest support of a structure wordnet

Synonyms

foundation base base basement basis bearing wall

Antonyms

Example

"Holonym: infrastructure (facilities sense)"

Etymology

From under- + structure.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.