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realm (EN)
noun

noun “realm”

singular realm, plural realms
  1. the area or environment where a particular concept or belief is prevalent
    In the realm of mathematics, accuracy is paramount.
  2. a formal or legal term for a kingdom or territory under the rule of a monarch or government
    The queen's decree was law throughout the realm.
  3. in fantasy or role-playing games, a mystical or magical world often governed by a supernatural being
    The sorcerer summoned creatures from a dark realm to do his bidding.
  4. in the study of viruses, the highest classification category above kingdoms
    Scientists classified the newly discovered virus within its own unique realm due to its unusual characteristics.