used to refer to a fact or piece of news that might be true or invented, and quickly spreads from person to person

The rumoured stock market crash has yet to take place. 谣传说股票市场将要崩溃，可到现在为止并没有出现这一情况。

[ + to infinitive ] The president is rumoured to be seriously ill. 传言说，总统现在病重。