: 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
Such pavers allow stormwater to be gradually filtered to the lot’s subbase, reducing flooding in the watershed and along the West Branch of the DuPage River, the release said.
—
Michelle Mullins, Chicago Tribune, 24 Apr. 2025
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, sandiegouniontribune.com, 13 July 2017
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Michelle Mullins, Chicago Tribune, 24 Apr. 2025
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, sandiegouniontribune.com, 13 July 2017
Cite this Entry
“Subbase.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subbase. Accessed 31 Oct. 2025.
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