Definition of subbase
: underlying support placed below what is normally construed as a base: such asa : the lowest member horizontally of an architectural base or of a baseboard or pedestalb : pervious fill (such as crushed stone) placed under a roadbed
Recent Examples of subbase from 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.
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
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