Definition of ill-founded in US English:



  • (especially of an idea or belief) not based on fact or reliable evidence.

    ‘ill-founded criticism’
    ‘her fear may be ill-founded’
    • ‘I have however held that that assumption is ill-founded.’
    • ‘In my view, that concept is ill-founded, as a matter of law.’
    • ‘Patients will not be granted discovery where their claims are ill-founded, irresponsible and speculative allegations based merely on hope.’
    • ‘By contrast, the Constitutional Court dismissed the appeal as ill-founded in respect of the right to property.’
    • ‘Rather, it is the predictable result of ill-founded pedagogical choices.’
    • ‘There has been a lot of ill-founded and mischievous speculation about these arrests and some ill-considered and aggressive comment directed at our organisation.’
    • ‘On the other hand, the motion for contempt, a serious matter, was ill-founded, given the fact that the formal order was never taken out.’
    • ‘But such suspicions are probably ill-founded.’
    • ‘Our Supreme Court's elimination-of-bias continuing education requirement is utterly ill-founded and obnoxious.’
    • ‘It follows that this part of the application is inadmissible as being manifestly ill-founded…’
    • ‘The barrage of well-meaning, but often ill-founded, criticism hardly makes a mother's job easier.’
    • ‘Subsequent campaigns showed that this belief was ill-founded.’
    • ‘So I'm happy that there's a protest even if it is a silly and ill-founded one.’
    • ‘Therefore, I conclude that the Warsaw Convention applies to this case and that the plaintiff's claim based on misrepresentation is ill-founded, both in fact and in law.’
    • ‘Consequently, the Court found that that part of the complaint was ill-founded.’
    • ‘Their example makes plain that saying I am merely interpreting Scripture actually proves nothing at all if the interpretation is ill-founded and unfaithful.’
    • ‘The decision that an application is manifestly ill-founded can necessarily be taken only in relation to rights set forth in the European Convention.’
    • ‘This is an insulting and ill-founded belief which I would advise you to reconsider.’
    • ‘Thus the argument is that attachments and loyalty are ill-founded if placed upon a human artifact, upon something man-made.’
    • ‘As it happens the attack was ill-founded and unjust; but the perception lingers.’
    baseless, groundless, without foundation, foundationless, without basis, unjustified, unsupported
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/ˈɪl ˈˌfaʊndəd//ˈil ˈˌfoundəd/