Pronunciation: (relm), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.