The universe of “fake news” is much larger than simply false news stories. Some stories may have a nugget of truth, but lack any contextualizing details. They may not include any verifiable facts or sources. Some stories may include basic verifiable facts, but are written using language that is deliberately inflammatory, leaves out pertinent details or only presents one viewpoint. "Fake news" exists within a larger ecosystem of mis- and disinformation.
Misinformation is false or inaccurate information that is mistakenly or inadvertently created or spread; the intent is not to deceive. Disinformation is false information that is deliberately created and spread "in order to influence public opinion or obscure the truth" (https://www.merriam-webster.com/dictionary/disinformation).
Claire Wardle of FirstDraftNews.com has created the helpful visual image below to help us think about the ecosystem of mis- and disinformation. And as she points out, "it's complicated."