Disinformation is when lies are told and spread deliberately, in an attempt to hide the truth or influence public opinion.
Disinformation has some things in common with misinformation; both involve the broadcasting of inaccurate or false information, usually in a public sphere like social media or on TV. But while misinformation sometimes spreads accidentally, disinformation is always deliberate and usually part of a government campaign to obscure the truth. The word derives from the Russian dezinformatsiya, which was the name of a KGB department that dispensed propaganda during the Cold War.