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[ground-lis] /ˈgraʊnd lɪs/
without rational basis:
groundless fears.
Origin of groundless
before 900; Middle English: bottomless, unfathomable; Old English grundlēas. See ground1, -less
Related forms
groundlessly, adverb
groundlessness, noun
baseless, unfounded, unjustified, idle. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for groundless
Contemporary Examples
Historical Examples
  • Possibly the suspicion, the fear that beset him was groundless.

    A Spirit in Prison Robert Hichens
  • Captain Dan's fears concerning the safety of his showcases were groundless.

    Cap'n Dan's Daughter Joseph C. Lincoln
  • He soon discovered, to his delight, that these fears were groundless.

    Shavings Joseph C. Lincoln
  • But if he feared a physical assault, his fear was groundless.

    Cap'n Eri Joseph Crosby Lincoln
  • It must be owned that his melancholy is anything but groundless.

    Views and Reviews William Ernest Henley
  • But her apprehensions were groundless; the rectitude of his own heart was a bar to the suspicion of her's.

    A Simple Story Mrs. Inchbald
  • Because I had certain information that this accusation was groundless.

    Debts of Honor Maurus Jkai
British Dictionary definitions for groundless


without reason or justification: his suspicions were groundless
Derived Forms
groundlessly, adverb
groundlessness, noun
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
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Word Origin and History for groundless

Old English grundleas "bottomless, unfathomable, vast;" see ground (n.) + -less. Figurative sense of "unfathomable" is from early 14c. Related: Groundlessly; groundlessness.

Online Etymology Dictionary, © 2010 Douglas Harper
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