Rĕalm, n.

(rĕlm), n. [O. Fr. realme, reaume, roialme, roiame, N. Fr. royaume, Pr. realme, reialme, reierme, O. Sp. realme, reame, It. reame, from Lat. regalis, royal. See REGAL.]

1. A royal jurisdiction or regal government; that which is under the dominion of a king; kingdom. “The absolute master of realms on which the sun perpetually shone.” Motley.
2. Hence, in general, province; region; country; domain; department; division; as, the realm of fancy.