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Word of the Day Tuesday, June 9, 2026

substratum

/ˈsʌbstrætəm/ noun · British & US
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What does substratum mean?

noun

A substratum is a layer or stratum underlying a surface or a system. It is often used to describe a fundamental or underlying principle or structure.

Example

"The new policy was built on a substratum of social justice and equality."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for substratum

Antonyms of substratum

Rhymes with substratum

Etymologically related