Definitions for understructureˈʌn dərˌstrʌk tʃər
Random House Webster's College Dictionary
un•der•struc•tureˈʌn dərˌstrʌk tʃər(n.)
a structure serving as a support; base or foundation.
foundation, base, fundament, foot, groundwork, substructure, understructure(noun)
lowest support of a structure
"it was built on a base of solid rock"; "he stood at the foot of the tower"
The supporting structure underneath something, such as a vehicle or bridge.
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