insubstantial
Americanadjective
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not substantial or real; lacking substance.
an insubstantial world of dreams.
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not solid or firm; weak; flimsy.
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not substantial in amount or size; inconsiderable.
an insubstantial sum.
adjective
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not substantial; flimsy, tenuous, or slight
-
imaginary; unreal
Other Word Forms
Etymology
Origin of insubstantial
From the Late Latin word insubstantiālis, dating back to 1600–10. See in- 3, substantial
Explanation
Insubstantial is an adjective that means lacking form, substance or nutritional value. If you're really hungry, a bowl of clear broth will seem pretty insubstantial. If there is insubstantial evidence to convict an accused criminal, he will be set free. In the office, insubstantial expenses should be paid out of the petty cash draw. A thin blouse is too insubstantial to be worn in this cold weather. And a candy bar makes an insubstantial lunch — a sandwich and fruit would be more nutritious.
Vocabulary lists containing insubstantial
The Grapes of Wrath
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The Tempest
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The Graveyard Book
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But CBS is already full of people who think they know what they’re doing, who believe they represent hallowed tradition, the so-called Tiffany network, against which the Free Press must seem a tad insubstantial.
From The Wall Street Journal ● Oct. 7, 2025
It’s a majority white district, with not insubstantial Asian and Latino populations.
From Los Angeles Times ● Apr. 26, 2024
He went on to call Cole's best verses insubstantial - "a light pack" - and claimed he was the Prince to Drake's Michael Jackson.
From BBC ● Apr. 8, 2024
The ads that failed were ultimately insubstantial, or otherwise objectionable.
From Slate ● Feb. 12, 2024
Her life before was as insubstantial as smoke.
From "The Girl Who Drank the Moon" by Kelly Barnhill
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
