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WORDNET DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun understructure has 1 sense

• understructure(n = noun.artifact) base, foot, foundation, fundament, groundwork, substructure - lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"
has particulars: bed, raft foundation
is a part of construction, structure
is a kind of support

THESAURUS

understructure

base, basement, basis, bearing wall, bed, bedding, bedrock, bottom, floor, flooring, fond, footing, foundation, fundament, fundamental, ground, grounds, groundwork, hardpan, infrastructure, pavement, principle, radical, riprap, rock bottom, rudiment, seat, sill, solid ground, solid rock, stereobate, stylobate, substratum, substruction, substructure, terra firma, underbuilding, undercarriage, undergirding, underpinning, understruction

For further exploring for "understructure" in Webster Dictionary Online