This is the 2475th most frequent Russian word.
предположительно
Presumably.
In this sentence, 'предположительно' is used to indicate that the time mentioned for the meeting's start is based on an assumption or unconfirmed information.
Предположительно, собрание начнётся в 10 утра.
Supposedly, the meeting will start at 10 AM.
Here, 'предположительно' conveys doubt or lack of certainty about the occurrence of the event (snowing).
Вчера, предположительно, шёл снег, но никто этого не видел.
Yesterday, it supposedly snowed, but no one saw it.
In this context, 'предположительно' implies an assumption about someone's expertise without definitive proof.