: an area of activity, interest, or knowledge. : a country that is ruled by a king or queen. See the full definition for realm in the English Language Learners Dictionary. realm.

What does this mean 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.

What is an example of realm?

Realm is defined as an area of land overseen by a king or queen. An example of a realm is a kingdom in a computer game. ... The definition of a realm is an area or a domain. An example of a realm is the general way to speak about a subject like science.