/ relm; NAmE / noun
1.
an area of activity, interest, or knowledge :
in the realm of literature
At the end of the speech he seemed to be moving into the realms of fantasy.
2.
( formal ) a country ruled by a king or queen
SYN kingdom :
the defence of the realm
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IDIOMS
- beyond / within the realms of possibility
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WORD ORIGIN
Middle English rewme , from Old French reaume , from Latin regimen government, from regere to rule. The spelling with -l- (standard from c. 1600) was influenced by Old French reiel royal.