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realm

[ relm ]
/ rɛlm /
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noun

a royal domain; kingdom: the realm of England.
the region, sphere, or domain within which anything occurs, prevails, or dominates: the realm of dreams.
the special province or field of something or someone: the realm of physics; facts within the realm of political scientists.

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Origin of realm

First recorded in 1250–1300; Middle English realme, reaume, Old French reialme, from Latin regimen “guidance, direction, rule,” influenced by Old French reial “royal” (see origin at royal)
1. See kingdom.
un·der·realm, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for realm

realm
/ (rɛlm) /

noun

a royal domain; kingdom (now chiefly in such phrases as Peer of the Realm)
a field of interest, study, etcthe realm of the occult
C13: from Old French reialme, from Latin regimen rule, influenced by Old French reial royal, from Latin rēgālis regal 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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