noun🔗ShareThe supporting part of a structure (either physical or organizational; the foundation)."The old house needed repairs because the substructure, the wooden frame beneath the floor, was rotting. "structurearchitecturebuildingorganizationpartChat with AIVocabulary GamePractice Reading
noun🔗ShareThe earth or gravel that the railway tracks are embedded in."The train tracks felt stable because the construction crew had recently reinforced the substructure with fresh gravel. "materialgeologystructureChat with AIVocabulary GamePractice Reading
