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Word of the Day Wednesday, June 10, 2026

unsubstantial

/ˌʌnˈsʌbstəntʃəl/ adjective · British & US
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What does unsubstantial mean?

adjective

Lacking substance or material reality; not substantial; lacking firmness or solidity.

Example

"The unsubstantial nature of the cloud made it difficult to grasp."

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

Synonyms for unsubstantial

Antonyms of unsubstantial

Rhymes with unsubstantial

Etymologically related