allegation
noun [ C ]
uk/ˌælɪˈɡeɪʃən/ usa statement that someone has done something wrong or illegal, but which has not been proved to be true:
allegation about sth The chief executive of the company resigned last autumn over allegations about his expenses.
allegation that She rejected the allegation that she had treated her staff unfairly.
make allegations of sth (against sb) He made allegations of unfair dismissal against his former employers.