Realm (?), n. [OE. realme, ream, reaume, OF. reialme, roialme, F. royaume, fr. (assumed) LL. regalimen, from L. regalis royal. See Regal.]
A royal jurisdiction or domain; a region which is under the dominion of a king; a kingdom.
The absolute master of realms on which the sun perpetually alone.
Hence, in general, province; region; country; domain; department; division; as, the realm of fancy.
© Webster 1913.