An exaggeration; a statement in excess of what is reasonable.(noun)
The tendency to overstate.(noun)
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Use "overstatement" in a sentence
"That overstatement is being cultivated to get more control of environmental and social issues."
"Also good is the news that the SEC won’t be enforcing any action for the pesky circulation overstatement from a while back."
"A good example of the overstatement is the PNHP study released yesterday which is rightly being carved up in among other places, Megan McCardle's blog."