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Definition of Understructure
1. Noun. Lowest support of a structure. "He stood at the foot of the tower"
Exact synonyms: Base, Foot, Foundation, Fundament, Groundwork, Substructure
Specialized synonyms: Bed, Raft Foundation
Group relationships: Construction, Structure
Generic synonyms: Support
Derivative terms: Basal
Specialized synonyms: Bed, Raft Foundation
Group relationships: Construction, Structure
Generic synonyms: Support
Derivative terms: Basal
Definition of Understructure
1. Noun. The supporting structure underneath something, such as a vehicle or bridge. ¹
¹ Source: wiktionary.com