Something that's stated as a fact but isn't true is misinformation, especially if this is done on purpose. During a political campaign, one candidate might accuse another of spreading misinformation about her.

Misinformation is sometimes simply incorrect, like when your friend explains the mechanics of how airplanes fly but gets most of the details wrong. There's also the kind of misinformation that's deliberate, meant to hurt someone's reputation or keep secrets hidden. A government might release misinformation to hide classified details from spies, for example. When you add the "bad or wrong" prefix mis- to information, you get misinformation.

Definitions of misinformation

n information that is incorrect

misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service
misinformation that is deliberately disseminated in order to influence or confuse rivals (foreign enemies or business competitors etc.)
Type of:
info, information
a message received and understood

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