If you say that something has ~ been done, you mean that you think that it has been done but you cannot be sure. (FORMAL)
He was given a letter ~ signed by the Prime Minister.
= supposedly
ADV: ADV with v, ADV cl/group
If you say that something has ~ been done, you mean that you think that it has been done but you cannot be sure. (FORMAL)
He was given a letter ~ signed by the Prime Minister.
= supposedly
ADV: ADV with v, ADV cl/group
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012