Final answer:
In the context of the universe's structure, 'generally' refers to the large-scale structure encompassing galaxy clusters, superclusters, and voids, aligned with the cosmological principle.
Step-by-step explanation:
The term 'generally' in the context of the structure of the universe usually refers to the large-scale structure that includes entities such as galaxy clusters, superclusters, and the vast voids and filamentary structures that are interspersed among them. Galaxy clusters consist of hundreds to thousands of galaxies gravitationally bound together. These clusters can group into even larger structures called superclusters, which span hundreds of millions of light-years and form part of interconnected filamentary structures across the cosmos. Voids are large regions with very few galaxies, taking up most of the volume but containing a minority of galaxies. The cosmological principle states that the universe, on these large scales, is homogeneous and isotropic, meaning it appears similar in all directions and locations, aside from evolution over time.