If you accuse someone of spreading disinformation, you are accusing them of spreading false information in order to deceive people.
例句
They spread disinformation in order to discredit politicians...他們散布假消息，企圖敗壞政治家的名聲。The government has been involved in a disinformation campaign, deliberately misleading and harassing its citizens.政府已經卷入了一場造假運動，他們有意誤導和擾亂民眾生活。
英英詞典釋義
Noun
1. misinformation that is deliberately disseminated in order to influence or confuse rivals (foreign enemies or business competitors etc.)