A community, place, or situation regarded as encapsulating in miniature the characteristic qualities or features of something much larger. The small town was a microcosm of the entire country, reflecting its diverse cultures and traditions.
A small, representative system having analogies to a larger system in constitution, configuration, or development. The classroom was a microcosm of society, with students from various backgrounds and beliefs.
A miniature world or self-contained universe, especially one that is considered to reflect or correspond to the larger universe. In medieval philosophy, humanity was viewed as a microcosm that echoed the structure of the cosmos.