subbase

/ˈsʌbˌbeɪs/
noun
  1. A layer of material placed under a base, such as in road construction or flooring.
    • The workers laid a gravel subbase before pouring the concrete driveway.
    • A proper subbase helps prevent cracks in the pavement over time.
    • The flooring contractor recommended a moisture barrier over the subbase.
  2. The lowest part of a base or pedestal, as in architecture or sculpture.
    • The architect designed a decorative subbase for the building's entrance pillars.
    • The column rested on a stone subbase to distribute its weight evenly.
    • The statue's subbase was carved from a single block of marble.
What does "subbase" mean? | whatsthatwordmean | whatsthatwordmean