noun. the lowest molding of an architectural base or of a baseboard.
- base (English)
- bas (Old French (842-ca. 1400))
- sub- (English)
Example sentences of the word subbase
1. Noun, singular or mass
Beginning at the end of the site near the house, dig a consistent slope of 1/8-inch per foot into the bottom of the subbase so surface water will flow toward the street.