sub·​base ˈsəb-ˌbās How to pronounce subbase (audio)
: underlying support placed below what is normally construed as a base: such as
: the lowest member horizontally of an architectural base or of a baseboard or pedestal
: pervious fill (such as crushed stone) placed under a roadbed

Examples of subbase in a Sentence

Recent Examples on the Web This is called the subbase, or unbound aggregate base. Mansour Solaimanian, The Conversation, 10 May 2024 According to the audit, streets are constructed in four levels — surface, base, subbase and subgrade — so a resurfaced road would not necessarily cure a flawed subgrade. Jeff McDonald,, 13 July 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'subbase.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1667, in the meaning defined above

Time Traveler
The first known use of subbase was in 1667

Dictionary Entries Near subbase

Cite this Entry

“Subbase.” Dictionary, Merriam-Webster, Accessed 24 Jul. 2024.

More from Merriam-Webster on subbase

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!