(1) The process of maintaining a defined set of data in more than one location. Replication involves copying designated changes for one location (a source) to another (a target) and synchronizing the data in both locations.
(2) The process of copying objects from one node in a cluster to one or more other nodes in the cluster, which makes the objects on all the systems identical.
(3) The process of exchanging modifications between replicas. Through replication, Notes makes all of the replicas essentially identical over time.