By which I mean a subject idiot / subject compartmentalizer in the original German. Someone who is "(slang, derogatory) an expert in a certain field who is ignorant of other fields, or only looks at problems through the lens of their own field."
I am wondering if I should delete this teasing remark, but I decided against it for you invoked the dictionary, and thus I think all is permissible. Including calling you a German word that sounds like it has English fuck in it
-----
Seriously now. Socialism does not have a single word definition much like the concept of health does not have a single diagnostic criteria like you need to be between X and Y height to be healthy, have cholestral between A and B, and so on. It is an amorphous concept by its very nature, a concept without form.
Socialism is a theory, the applied nature of the theory has different ideas of how to implement this in a praxis / practical form. The definition you are quoting is defining something based off the praxis implementation that someone in the past had, but the nature of praxis is ideas change due to changing circumstances and we have both history and theory to act as guiding lights above the diving line, stars in the heavens to act as lodestones but they will never ever be reached for the stars are amorphous things and you can't touch them.
-----
You are ignorant about the theory and history Mookie and that is okay. You have lived a far more practical life than I have.
But here is a point about language told in a comic.
https://existentialcomics.com/comic/234
Sidenote Mookie have you read the Mars Trilogy by Kim Stanley Robinson? Stuff in the news plus this thread made me think of it and it is kind of relevant to the topic at hand.