The term realm is popular in fantasy and fiction, but the true realm meaning is often misunderstood by beginners. You might see a realm definition that says the meaning of realm is a kingdom, which is not entirely wrong. The realm is also used to distinguish between power levels in fantasy novels and fiction, especially in Eastern Fantasy, Xianxia, and Xuanhuan cultivation novels. But this still does not answer the question. What is a realm?
What is a Realm Definition
The Correct Definition of a realm is as follows: A realm refers to an independent space or domain that has its own set of rules. Realm can refer to a world, or it can also refer to an entire universe. So that’s why I said that realm can mean a kingdom, as a kingdom has its own territory and rules.

The same goes for realm use to define power levels and cultivation ranks. It is also somewhat correct, as each cultivation rank in Xianxia has its own rules and prerequisites to achieve it.
Realm Ranks in Xianxia
Xianxia authors love to use the term Realm when referring to worlds in the novels. Not all realm worlds have the same rules and size. in xianxia and xuanhuan novels, the worlds are divided into realm ranks. The realm rank is based on the size and rules of the world. The bigger the world, the more complete the rules it has. That means it’s a higher-ranking world, and its inhabitants can achieve higher cultivation levels.
There are also special world that has unique rules that are very suitable for certain species cultivation. These realms are often depicted as invaders in Xianxia. Because of special rules in these realms, the cultivators can become warmongers who look down on other realms.
The following are the 6 most commonly mentioned types of World realms in Xianxia novels.
Mortal Realm
The mortal realm is the lowest-ranked realm. It is often referred to as the lower realm or lower world by cultivators of the upper world as they look down on it. But don’t underestimate the mortal realms, or you will pay a heavy price. more than 90% of the protagonists in novels I have read start from the mortal realm.
There are often many worlds in the mortal realm; the worlds in the mortal realm are smaller in comparison to the worlds in the higher realm, but even the smallest world in Xianxia is 100s and 1000s of times longer than Earth. Some are so big that their land mass is larger than the whole solar system.
Immortal Realm
Immortal Realm is often referred to as the upper realm, but in most xianxia novels, it is not the highest level of the realm. Some Xianxia authors also refer to the Immortal Realm as the Heaven Realm. When a cultivator from the mortal realm reaches a certain stage in cultivation, they can ascend to the upper realm.
Cultivators of the Immortal realm are called immortals as they have a higher lifespan, ranging from 10000 to almost infinite, depending on the cultivation rank. They are more powerful than the cultivators of the mortal realms. There can be many worlds in the immortal realms or a single massive continent, depending on the choice of author.

Divine Realm
Divine Realm is considered by many to be the highest level of the world realms. this where the true powerhouses and rulers of the world live. They have an infinite lifespan, and they are often referred to as true gods and true immortals. The divine realm has the most complete rules and the best environment for cultivation. It is the destination every cultivator yearns for.
The Divine Realm, being too big, is often depicted as one big world that so massive that even many powerful cultivators of the divine realm will need countless years to traverse it.
Demon Realm
Demon Realm, as the name suggests, is a world realm where demons reside. The demon realm has a special set of rules that are very suitable for the cultivator of the demon dao. The cultivators of the demon realm are often considered battle maniacs and mostly walk the path of slaughter.
The Level of Demon Realm is the same as the Immortal Realm in most xianxia novels. Their size is not much different, but the rules are completely different. Power levels are often the same.
Devil Realm
Devil Realm is the realm where devil cultivators reside. Like the demon realm, the devil realm also has a special set of rules that are suitable for cultivators of the devil dao. The cultivators of the devil realms are often depicted as ruthless and cunning.
The Level of Devil Realm is the same as the Immortal Realm in most xianxia novels. Their size is not much different, but the rules are completely different. Power levels are often the same.
Hell Realm
Hell Realm is the most confusing for people new comers. Hell realm is also sometimes referred to as the Nether Realm. Why is it confusing? Sometimes, you would see them invading the mortal realm; other times, the immortal and divine realm. Hell is most unique. it also has its own rules and environment. Hell realm is where most of the souls of mortals and low-level cultivators go.
Hell Realm also has its own special Unique species that live there. There is no specific level to the Hell Realm. You could consider it as an independent universe. where there is no distinction between world realm ranks, like mortal, immortal realms, etc.
Conclusion
Understanding the realm meaning in fantasy – especially in Xianxia and cultivation novels comes down to one key idea: a realm is an independent domain with its own rules, structure, and limits. Whether it refers to a kingdom, a world, or an entire universe, the defining trait of a realm is its separation and unique governing laws.

In Eastern fantasy, the concept becomes even richer. Realms are not just places. They also define power progression, hierarchy, and the limits of existence. From the humble Mortal Realm to the vast Divine Realm, each level represents not only a bigger world but also deeper, more complete laws of reality. At the same time, specialized realms like the Demon, Devil, and Hell Realms show how different rules can shape entirely different types of beings and cultures.
So, when you encounter the term in any story, don’t lock it into one meaning. Instead, ask:
What rules define this realm, and how is it different from others?
That’s where the true understanding lies.
FAQs
1. What is the simple realm definition in fantasy?
A realm is a separate domain or space with its own rules, which can range from a kingdom to an entire universe.
2. Why is the realm meaning different in Xianxia novels?
In Xianxia, realms are used both as worlds and power levels, making the term more complex than in Western fantasy.
3. What makes special realms like Demon or Devil Realms different?
These realms have unique rules and environments that favor specific cultivation paths, often producing more aggressive or specialized cultivators.
4. Are Demon and Devil Realms evil by default?
Not necessarily. They’re often portrayed that way, but it really depends on the story. In some novels, they just follow different cultivation paths and philosophies, not outright evil ones.
5. Why is the Hell Realm so inconsistent?
Because authors use it differently. Sometimes it’s an afterlife, other times it’s a full-fledged world with its own ecosystem. That flexibility is exactly why it confuses newcomers.
6. Do realms only exist in Eastern fantasy?
Nope. The idea exists everywhere. Western fantasy also uses realms. think different dimensions, magical worlds, or planes of existence—just without the same structured ranking system as Xianxia.
