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Word of the Day Tuesday, June 9, 2026

insubstantial

/ɪnˈsʌbstəntiəl/ adjective · British & US
Valid in UKValid in US
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What does insubstantial mean?

adjective

Lacking substance or material reality; lacking weight or importance. Not substantial or solid.

Example

"The fireworks display was an insubstantial attempt to entertain the crowd."

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

Synonyms for insubstantial

Antonyms of insubstantial

Rhymes with insubstantial

Etymologically related