cosmos Meaning, Definition & Usage

  1. noun everything that exists anywhere
    universe; creation; macrocosm; existence; world.
    • they study the evolution of the universe
    • the biggest tree in existence
  2. noun any of various mostly Mexican herbs of the genus Cosmos having radiate heads of variously colored flowers and pinnate leaves; popular fall-blooming annuals
    cosmea.

WordNet

Cos"mos noun
Etymology
NL., fr. Gr. ko`smos order, harmony, the world (from its perfect order and arrangement); akin to Skr. ad to distinguish one's self.
Definitions
  1. The universe or universality of created things; -- so called from the order and harmony displayed in it.
  2. The theory or description of the universe, as a system displaying order and harmony. Humboldt.

Webster 1913