noun
realm
rehlm
noun
1
A kingdom or territory ruled by a monarch or supreme authority.
"The knight swore loyalty to the king and his realm."
"Peace finally settled over the realm after years of war."
2
A particular area of activity, knowledge, or interest.
"Quantum computing still belongs largely to the realm of theoretical research."
"Such extravagant claims fall firmly within the realm of fantasy."
How to Use Realm
Learner’s notesIn plain EnglishA kingdom, or more loosely, a whole area or domain of something (like "the realm of possibility").
Common pairings
the realm of possibility
a distant realm
ruler of the realm
Word Forms
realms plural
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The knight swore loyalty to the king and his _____.
Etymology
From Old French reaume/realme ("kingdom"), of murky origin, likely a blend of Latin regimen and rēgālis; the modern spelling settled around 1600.