But there seems to exist another phenomenon that is described in the book The Mindset, where the term originates, which is quite different.
Let's take some examples from partner dancing which I am very familiar with.
In some dance cultures, it is customary for the leader to try to maximize the area on the dance floor that is occupied (or "owned") by the couple. This is done, so you can dance more freely, do whatever you please. Such leaders may use many methods, such as intimidation and even physical force to push "weaker" leaders away from the area they consider their own.
There are other dance cultures, where the leaders try to co-operate. For them, the area on the dance floor is shared. I feel where the other leaders are going, in a way I dance with the other leaders as well. We will try to harmonize our movements so that we can all share the area. The leaders who are able to effectively use the space are highly valued in such cultures. Beginners are given a little bit more slack, of course, but at the same time, non-cooperating leaders may be pushed out by the co-operating leaders.
I once participated in an Argentine tango dance event (called a milonga) in Buenos Aires, which was for locals only. Many milongas are filled with tourists, so the locals try to keep the tourists out from certain events they consider their own.
I was invited to the event by a friend, a follower, who knows many locals and so is accepted member of that event. But even knowing my friend did not give me any slack, but my co-operation was put into a rough test from the beginning.
Many leaders intentionally surrounded me on the dance floor, and pressured me from all sides. As I am quite experienced in dancing in small spaces, I did not hesitate and was able to continue my dancing and keep co-operating with the other leaders although they were putting me into this test. After I had passed this test, I was accepted, and the testing stopped.
I have also been invited into events where one key requirement to even get allowed to apply is that the organisers know your dancing, and they especially need to know that you will co-operate. These are lovely events, because the level of co-operation is very high.
I think one key part of the real growth mindset is co-operation. You give up on fighting for some resource (in this case, the area you occupy on the dance floor), and you will gain something more valuable -- co-operation with the peers -- and through this co-operation you will have enough of the resource you need -- in this case you will always have enough space for your dancing.
Another part of the real growth mindset appears to be the attitude of anti-fragility. If I accept the challenge of trying to learn to dance without aggressively trying to occupy space -- even though I would be skilled enough to do it -- that pressure will eventually teach me to become an even better dancer. It is not easy, however, it may take years of persistent effort to overcome this hurdle. But without this pressure I would have never learned.