1 : the state or territory ruled by a queen. 2 : the position of a queen.

Is there a word queendom?

the position or status of a queen. the realm of a queen.

What does the word realm?

the region, sphere, or domain within which anything occurs, prevails, or dominates: the realm of dreams. the special province or field of something or someone: the realm of physics; facts within the realm of political scientists.