Realm
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Historical Usage
Originally referred to a royal kingdom, often used in historical or fantasy contexts. The queen's decree was felt throughout the entire realm.
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Metaphorical Extension
Extended to describe any area someone has control over, even metaphorically. She was undisputed in the realm of ice skating competitions.
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Formality
A formal term often replaced by 'country' or 'nation' in everyday conversation. Our realm will prosper under the new policies.