There is no “clinical” meaning of the word; it was coined to mean something and fewer than 10 years later, what it referred was specified in the Communist Manifesto. Definitions of words ARE the associations they have with that word; that’s the point.
In common discourse, when someone says communism, people do not think of hippies living in a commune or a cooperative like Mondragon, they think of Marxism and its off-shoots.
We may just have to agree to disagree on this one, since while communism may be broader than just Marxism or Maoism, since Stalinism, Leninism, Titoism, etc, would all be included, they are all off-shoots. Something that was not an off-shoot of Marxism and which was so different as to need explanation, would not be what comes to the average person’s mind when the word is used.