supercluster

This term is used exclusively within the field of astrophysics and cosmology to describe the largest known structures in the observable universe. It carries a highly technical register and is rarely used in casual conversation unless discussing science or space exploration.

Because it describes a hierarchical organization of matter, it is often contrasted with smaller scales such as galaxy clusters or individual galaxies. The term implies a gravitational binding that organizes vast regions of space into filaments and walls, separating them from immense cosmic voids.