Definition of unfounded in US English:

unfounded

adjective

  • Having no foundation or basis in fact.

    ‘her persistent fear that she had cancer was unfounded’
    • ‘Mr Grant's letter was far from accurate, in fact the statements he made would appear to be unfounded.’
    • ‘It's my own duty to expose Caz for the flimsy lies and unfounded insults she slaps up here on a weekly basis.’
    • ‘He said fears reduced spending would harm improvements to roads and footpaths were unfounded.’
    • ‘It was all very negative and most of it was unfounded and/or hyperbole which I was able to refute fairly easily and did so.’
    • ‘In the new democratic system that is now operating, both views are unfounded.’
    • ‘From there on rational thought was lost in a fug of unfounded speculation.’
    • ‘To our utter disbelief, the story turned out to be totally unfounded, without a grain of truth.’
    • ‘The company has yet to remark whether the report was founded or unfounded.’
    • ‘So the great war hero is going to bring up unfounded accusations against George Bush.’
    • ‘I hope the passage of time proves these fears unfounded and that the province moves into an era of greater peace and prosperity.’
    • ‘Wilson's fear that this opens the door to Nationalism seems unfounded because the future is already here and it works.’
    • ‘Once I got home from work though, I quickly discovered that it was an unfounded suspicion.’
    • ‘Solicitors representing the University claim that the grounds of the boycott are unfounded.’
    • ‘Furthermore, I deeply deplore the unfounded allegations and personal insults put forth in the letter.’
    • ‘Yet the government's worry about loosening the restrictions was not unfounded.’
    • ‘It's really important to get beyond those completely unfounded generalizations.’
    • ‘Instead, they want all complaints subjected to a vetting process to weed out those that are malicious or unfounded.’
    • ‘But their fears proved unfounded because half the building is effectively below street level.’
    • ‘The report said that warnings about foundation trusts had so far been unfounded.’
    • ‘It comes from an unfounded suspicion that we will use new science and technology to destroy the planet, and ourselves.’
    groundless, baseless, unsubstantiated, unproven, unsupported, uncorroborated, untested, unconfirmed, unverified, unattested, unjustified, unwarranted, foundationless, ill-founded, without basis, without foundation, not backed up by evidence
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Pronunciation

unfounded

/ˌənˈfoundəd//ˌənˈfaʊndəd/