Noun: subbase 'súb,beys
- The lowest moulding of an architectural base or of a skirting board
"The carpenter carefully installed the subbase along the bottom of the wall"
- A layer of material beneath the base course of a road or foundation
"The contractor laid a gravel subbase before adding the concrete"
Derived forms: subbases
Type of: molding [N. Amer], moulding [Brit, Cdn]
Encyclopedia: Subbase