sublunar

/sʌbˈluːnər/
adjective
  1. Relating to the Earth or the world below the moon; earthly or terrestrial.
    • The poem contrasts the eternal stars with the fleeting sublunar world.
    • In medieval cosmology, everything sublunar was subject to decay.
    • Ancient philosophers believed the sublunar realm was imperfect and changeable.
Antonyms
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