sub·​base | \ ˈsəb-ˌbās How to pronounce subbase (audio) \

Definition of subbase

: underlying support placed below what is normally construed as a base: such as
a : the lowest member horizontally of an architectural base or of a baseboard or pedestal
b : pervious fill (such as crushed stone) placed under a roadbed

Examples of subbase in a Sentence

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 example sentences are selected automatically from various online news sources to reflect current usage of the word 'subbase.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of subbase

1667, in the meaning defined above

Keep scrolling for more

Learn More About subbase

Time Traveler for subbase

Time Traveler

The first known use of subbase was in 1667

See more words from the same year

Dictionary Entries Near subbase




See More Nearby Entries 

Statistics for subbase

Cite this Entry

“Subbase.” Dictionary, Merriam-Webster, Accessed 25 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

More from Merriam-Webster on subbase Encyclopedia article about subbase


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Love words? Need even more definitions?

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