This is not a definition, this is an expression of the leftist ideological position. I have seen many situations on Wikipedia where factually correct edits are reversed because they disagree with the ideology of the wikipedia editors who have stature.

It is kinda like hacker news where a useful comment like mine is voted down to zero, while someone calling me names and repeating ignorant comments that are consistent with the groupthink of the left, get modded up.

It is not that their name calling and ideological regurgitation are superior to my argument... it is that people vote based on ideology, often when they are profoundly ignorant of the reality.

I suggest that you not use Wikipedia as a source for definitions, as that one is particularly heinous. In common usage one could use the term "monopoly" to describe entities with strong pricing power, but common usage is not usage in economics, yet the wikipedia definition starts "in economics".

Any "Economist" who defines a monopoly as a company that does not have ownership of the entire market, is an ideologue pretending to be an economist.

In economics, they use this term correctly.