substructure Meaning, Definition & Usage

  1. noun the basic structure or features of a system or organization
    infrastructure.
  2. noun lowest support of a structure
    foundation; groundwork; understructure; base; fundament; foot.
    • it was built on a base of solid rock
    • he stood at the foot of the tower

WordNet

Sub*struc"ture noun
Etymology
Pref. sub- + structure.
Definitions
  1. (Arch.) Same as Substruction.
  2. An under structure; a foundation; groundwork.

Webster 1913