royal

Definition:

The term "royal" describes people and things which are associated with a king or queen.

Examples of things that can be called "royal" include a king's clothing, palace, throne, or crown.
A king or queen usually lives in a royal palace.
A king wears special clothing, sometimes called "royal robes." Often a king's robes were colored purple, which was a rare and expensive type of dye.
In the New Testament, believers in Jesus are called a "royal priesthood." Other ways to translate this could include, "priests who serve God the King" or "called to be priests for God the King."
The term "royal" could also be translated as "kingly" or "belonging to a king."