If you describe an accusation, rumour, or report as ~, you mean that it is not true and is not based on facts.
The charges against her are ~.
...~ allegations of drug taking.
= unfounded
ADJ
If you describe an accusation, rumour, or report as ~, you mean that it is not true and is not based on facts.
The charges against her are ~.
...~ allegations of drug taking.
= unfounded
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012