Definitions

groundless

[ground-lis] / ˈgraʊnd lɪs /

ADJECTIVE

without reason, justification

Synonyms

STRONGEST

baseless false flimsy gratuitous illogical illusory unfounded unjustified unsupported unwarranted

WEAK

bottomless causeless chimerical empty foundationless idle imaginary unauthorized uncalled-for unprovoked

Antonyms

STRONGEST

correct genuine justified real reasonable right substantiated warranted

WEAK

called-for grounded proven

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.

A Kremlin spokesman rejected the allegations as groundless.

From The Wall Street Journal • Dec. 12, 2025

China accused Britain's Keir Starmer of making "groundless accusations" on Tuesday, a day after the prime minister said he would engage with Beijing but warned China posed a national security threat.

From Barron's • Dec. 2, 2025

"But all these claims are groundless and without proof."

From BBC • Sep. 24, 2025

Lot of reasons for that, it’s not groundless optimism.

From Salon • Aug. 5, 2025

My fears were groundless, there was nothing to it.

From "Invisible Man" by Ralph Ellison

Vocabulary lists containing groundless

"Oedipus the King" by Sophocles

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Awkward

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Because They Marched

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