In science we attempt to classify everything. And everything seems to be a subset of something else. Planet is a part of a solar system, solar system is a part of a galaxy, galaxy is part of the universe, universe is a part of our dimension, etc.
Obviously there are exceptions to this, rogue planets, but we still consider them contained.
I understand the idea of multidimensions is theoretical, but if they exist, do we have a name or even a theory what might contain them?
The term “Dimension” is a math term. It only applies to theories of multiple universes in comic books and sci Fi shows.
Also it’s a mistake to suggest that the goal of science is to classify everything. Science seeks models that have explanatory and predictive power. Classification is simply a tool to achieve those goals, not a goal in itself.