There is also a difference between suppression and prevention and nowhere in the definition given is word prevention used. Facebook suppressed dissemination of this story thus, by the definition given, it engaged in censorship. If you want to argue that the definition is wrong, fine. But that is not what you are arguing.
>nowhere in the definition given is word prevention used
There is no official or single exhaustive definition to compare text strings with and glean meaningful information. The issue is what is meant when people use the word in typical contexts. Attempted or actual prevention of certain kinds of speech is the operative meaning in the context of censorship.
