realm

noun

ˈrelm 

1

: kingdom sense 3

2

: sphere, domain

within the realm of possibility

3

: a primary marine or terrestrial biogeographic division of the earth's surface

Synonyms of realm

• area
• domain
• element
• field
• department
• sphere
• kingdom
• walk
• territory

Examples of realm in a Sentence

new discoveries in the realm of medicine

in political and legal realms

Recent Examples on the Web

Ken Paller, a sleep researcher and a cognitive neuroscientist at Northwestern University, told me that Simon and Emmons effectively condemned sleep learning to the realm of science fiction and quackery. —Shayla Love, New Yorker, 1 May 2026

None of this would’ve been possible without Lively and Baldoni, adversaries whose spite and resources compelled them to continue to pursue litigation when just about everyone else in their positions would have quickly settled in the cloaked realm of arbitration. —Gary Baum, HollywoodReporter, 30 Apr. 2026

With one of the best character trees in gaming history and a massive, eclectic and vibrant fantasy realm to explore, Bethesda’s AAA title was recently upgraded for modern systems. —Bestreviews, Chicago Tribune, 30 Apr. 2026

Most people have come to terms with that, but things get murkier in the realm of AI. —ArsTechnica, 30 Apr. 2026

Word History

Etymology

Middle English realme, from Anglo-French, alteration of Old French reiame, from Latin regimen control — more at regimen

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing realm

• coin of the realm
• outside the range/realm of possibility
• outside the realm of the possible
• range/realm of possibility
• within the range/realm of possibility
• within the realm of the possible

Rhymes for realm

• elm
• helm
• overwhelm

Kids Definition

realm

noun

ˈrelm 

1

: kingdom sense 1

2

: field of influence or activity

the realm of art