* Thai: It can be a Thai word for "king".
* Japanese: It can be a Japanese word meaning "thunder" or "lightning".
* Other: It could be a name, a place name, or a specific term in a different language.
To understand the meaning of "rai", you need more context. For example:
* What language is it from?
* What is the sentence or phrase it's in?
Please provide more information so I can help you understand the meaning of "rai" in your specific context.