A Replication Object Definition describes the structure and content of a Replication Object.
Some Replication Object Definitions are part of the IFS/Applications components and the repository should have this information installed. If not it should be possible to install them.
There should not be any need create any Replication Object Definitions on the replica. If any new Replication Object Definitions has been created at the Master (Creating Replication Objects on Master) they should be imported into the Replica repository.