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Synonyms

baseless

American  
[beys-lis] / ˈbeɪs lɪs /

adjective

  1. having no base; bases; without foundation; groundless.

    a baseless claim.
baseless British  
/ ˈbeɪslɪs /

adjective

  1. not based on fact; unfounded

    a baseless supposition
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • baselessly adverb
  • baselessness noun

Etymology

Origin of baseless

First recorded in 1600–10; base 1 + -less

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.

"Any insinuation, without evidence, that a member of the government engaged in these acts is baseless and irresponsible," a White House spokesperson told several media outlets.

From Barron's • Mar. 27, 2026

“However, any implication that Administration officials are engaged in such activity without evidence is baseless and irresponsible reporting.”

From Salon • Mar. 25, 2026

Meta previously rejected the EU’s decision to start scrutinizing the measure, calling its claims baseless and saying that AI chatbots strain its systems.

From The Wall Street Journal • Mar. 5, 2026

“Mr. Glover denies these baseless allegations in the strongest possible terms,” a legal representative for Glover said in a statement on Thursday.

From Los Angeles Times • Feb. 26, 2026

Her son was a blessing, and Laila was relieved to discover that her fears had proved baseless, that she loved Zalmai with the marrow of her bones, just as she did Aziza.

From "A Thousand Splendid Suns" by Khaled Hosseini

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.