- the great world or universe; the universe considered as a whole (opposed to microcosm).
- the total or entire complex structure of something: the macrocosm of war.
- a representation of a smaller unit or entity by a larger one, presumably of a similar structure.
- a complex structure, such as the universe or society, regarded as an entirety, as opposed to microcosms, which have a similar structure and are contained within it
- any complex entity regarded as a complete system in itself
