subbase

American  

[suhb-beys] / ˈsʌbˌbeɪs /

noun

1. Architecture. the lowest part of a base, bases, as of a column, that consists of two or more horizontal members.

2. Mathematics. a collection of subsets of a topological space having the property that every open set of a given topology can be written as the union of intersections of finite numbers of sets in the collection.

---

subbase British  

/ ˈsʌbˌbeɪs /

noun

1. the lowest part of a pedestal, base, or skirting Compare surbase

---

Other Word Forms

• subbasal adjective

Etymology

Origin of subbase

First recorded in 1820–30; sub- + base ¹

Example Sentences

To repair one 12-foot-wide patch near Central High School, crews dug down 6 feet to the subbase.

From Washington Times