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English definition of “realm”

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realm

noun [C] uk   /relm/ us  

realm noun [C] (AREA)

C2 an area of interest or activity: Her interests are in the realm of practical politics.

realm noun [C] (COUNTRY)

formal a country ruled by a king or queen: the defence of the realm The matter was hotly debated in all the towns of the realm.
(Definition of realm from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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