realm
/rɛlm/
noun
- A kingdom or area ruled by a monarch.
- The king's realm stretched from the mountains to the sea.
- The borders of the realm were protected by a strong army.
- She was the most powerful queen in the realm.
- A particular area of activity, interest, or knowledge.
- Quantum physics is a complex realm of science.
- The discovery opened up a new realm of possibilities for medicine.
- She is an expert in the realm of digital marketing.