Even better: https://www.dictionary.com/browse/oligopoly

Oligopoly _specifically_ describes what we have here. I learned a new word today.

From your link: "the exclusive possession or control of something", "a company or group that has such control".

You must be trolling.

I'm not. But I do find it interesting how some people here don't like certain definitions and claim they are wrong.

You're describing markets the ways journalists are joked[1] about describing guns. Except you're doubling down and saying "No, you're wrong. All assault rifles are AK-47s, everyone knows what I mean when I say an AK-47, you know, a gun that shoots bullets fast and stuff!"

[1] https://www.reddit.com/r/funny/comments/3h74f3/a_journalists...

A "group" in a business sense isn't distinct, unrelated entities.

The company I work for is the "something something group".

You claim our definitions are wrong as well!