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

Example Sentences

Recent Examples on the Web 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 29 May. 2023.

More from Merriam-Webster on subbase

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