In gaming:
* Return to Ravnica: A set in the Magic: The Gathering card game.
* Ready to Race: A term used in racing games.
In other contexts:
* Return to Sender: A postal abbreviation meaning the package should be sent back to the origin.
* Run to Run: A term used in manufacturing to describe a specific production cycle.
* Root to Root: A gardening term that refers to the entire root system of a plant.
* Road to Recovery: A phrase used to describe the process of getting better after an illness or injury.
To figure out the correct meaning of RtR, you need to consider the context in which it is used. For example, if you see it in a conversation about Magic: The Gathering, it most likely refers to Return to Ravnica.
Can you provide more context about where you saw RtR? This will help me determine the correct meaning.