/relm/ , n.
1. a royal domain; kingdom: the realm of England.
2. the region, sphere, or domain within which anything occurs, prevails, or dominates: the realm of dreams.
3. the special province or field of something or someone: the realm of physics; facts within the realm of political scientists.
[ 1250-1300; ME realme, reaume reialme, deriv. of reial regalis REGAL ]
Syn. 1. See kingdom .