Is there a way to define a IntDef in Kotlin?

Sure, the same as for Java, the only difference you cannot keep constants inside of annotation body (will be available on Kotlin 1.3)

Thank you and looking forward to 1.3!

But again, it's possible to define IntDef annotation even now

@Daniel I am using object for that currently.

@radityagumay Thank you for your reply! Can you elaborate a bit on your solution?

object Foo { const val number = 3 } @Daniel