A realm is the dominion of a king or queen; a kingdom. Realm may also more broadly refer to everything which falls within a certain set of parameters.

Look up realm in Wiktionary, the free dictionary.

Realm may also refer to:

• biogeographic realm, the largest scale bio-geographic division of the Earth's surface
• A hyperplane in geometry
• Domain (biology), the highest taxonomic rank of life, also called realm
• Realm (virology), the highest taxonomic rank of viruses

• Realm, an English translation for two terms in Buddhist cosmology:
  • Trailokya, or three realms
  • Six realms (gati)
• Plane (esotericism)

• Realm (database), an object database and platform created primarily for mobile devices maintained by Realm Inc.
• A URL pattern in OpenID protocol, for which the OpenID authentication is valid
• An ID for an instance of a server software- HTTP transmits Realm when answering to a Basic access authentication request to distinguish different areas on server
• A scope of operation in networking or in security — as in Active Directory realms

• Realms (album), by Cindy Wilson, 2023
• Realm (magazine), a British coffee-table magazine
• Realm Media, formerly Serial Box, an American audio entertainment company
• "Realms", a song by Hawkwind from Space Bandits
• The Realm (film), a 2018 Spanish thriller film

• Commonwealth realm, one of the states of the Commonwealth of Nations that recognize King Charles III as monarch
• German Reich, or German Realm, the nation state of the German people
• The Realm (company), a surfing products and clothing company

• Realmz, a 1994 fantasy adventure
• Relm (disambiguation)

This disambiguation page lists articles associated with the title Realm.
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