More definitions on the subject.
http://theanarchistlibrary.org/library/emma-goldman-there-is-no-communism-in-russia
https://theanarchistlibrary.org/library/alexander-berkman-what-is-communist-anarchism
https://theanarchistlibrary.org/library/petr-kropotkin-the-conquest-of-bread
http://theanarchistlibrary.org/library/the-anarchist-faq-editorial-collective-an-anarchist-faq

You cant know what you dont know, nor that you dont know it.