Definitions

1. noun

A domain or sphere of activity, interest, or thought; a sphere or domain in which something is dominant or prevalent.

“The kingdom is a realm of beauty and wonder.”

2. noun

A domain or sphere over which a king or queen has sovereignty; a kingdom or empire.

“The medieval realm of England was known for its castles and knights.”

3. noun

A particular sphere or range of experience or activity, especially one in which someone is an expert or dominant.

“He was the master of his realm, with a vast knowledge of ancient history.”

4. verb

To bring under control or dominion, especially by conquest or persuasion; to bring within the sphere of one’s influence or control.

“The new law will help to reign in the rogue corporations and bring them under control.”

5. verb

To limit or restrict something, especially a person’s freedom or activity.

“The new policy aims to reign in the spending and get the budget back on track.”