From Longman Dictionary of Contemporary Englishbe without foundationbe without foundation (also have no foundation) formalPROVE if a statement, idea etc is without foundation, there is no proof that it is true SYN be groundless Davis dismissed the allegations as being without foundation. → foundation
Examples from the Corpus
be without foundation• The Observer said that it had not intended to convey that meaning, and accepted that the allegation was without foundation.• I believe that claims of "psychic powers" are without foundation. 