An abstract sphere of influence, real or imagined. / The domain of a certain abstraction. / (computing) A scope of operation in networking or security.

plural of realm

Archaic spelling of realm.

plural of realme

A solemn oath to leave and never return to the kingdom or realm.

(chiefly historical, England law) To swear to leave the realm as soon as possible and not return without the permission of the sovereign.

(law, dated) The legal money of a country. / (figuratively) Something that is valued like money within a particular context.

plural of peer of the realm

(UK) Any member of the House of Lords who is not a life peer. / (UK, historical) Any member of the hereditary peerage of the United Kingdom, (chiefly) of the Kingdom of England.

A member state of the Commonwealth of Nations (as most former British colonial possessions) which is a realm (kingdom) in personal union with the United Kingdom, i.e. has the British Sovereign as its 'shared' head of state, which is usually represented in its capital by a governor general.