OSPF Terminology
Link: a network or router interface assigned to any given network. Within OSPF, a link is synonymous with an interface.
Interface: a physical or logical interface on a router. When added to the OSPF process, the interface is considered by OSPF as a link. If the interface is up, the link is up! OSPF uses this association to build its link database.
LSA (Link State Advertisement): an OSPF data packet containing the link state and routing information shared among OSPF routers.