[dis-in-fer-mey-shuhn, dis-in-]
false information, as about a country's military strength or plans, publicly announced or planted in the news media, especially of other countries.

1965–70; dis-1 + information, as translation of Russian dezinformátsiya < French désinform(er) to misinform + Russian -atsiyaLatin -ātiō (see -ation)

disinformation, misinformation.
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World English Dictionary
disinformation (ˌdɪsɪnfəˈmeɪʃən)
false information intended to deceive or mislead

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1955, from Rus. dezinformatsiya (1949).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
There's also a lot of disinformation out there and oddball conspiracy theories
  that need to be debunked.
Spreading disinformation may not be legally punishable but that does not make
  it right.
The old-style social networks based on strong relationships aren't as subject
  to infiltration and disinformation campaigns.
But, of course, it could all be a disinformation tactic.
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