it means there are several great powers who balance each other and none are strong enough to impose their will onto others, like the us did during the 90's and 2000's. think something like the concert of europe in the 19th century. obviously we aren't there yet because the us and china are infinitely stronger than the rest in every field, but russia, india, brazil, turkey, saudi arabia and various other countries are shilling hard for it because that would mean they could rearrange their backyard at their will without worrying about pesky westoids getting involved. a good example of that is the karabakh conflict which was resolved essentially between turkey+azerbaijan and russia with the us and eu having absolutely nothing to say.
Poland