Correlative ("corelative," UK spelling) is the term adopted by Wesley Newcomb Hohfeld to describe the philosophical relationships between fundamental legal concepts in jurisprudence.
Hohfeld was concerned that there was some ambiguity in the explanation of the similarities and differences between concepts in law.
When two concepts are Hohfeldian opposites (technically, logical contradictions), they are mutually exclusive.
Thus, if A has a right with regard to B, an analysis of their relationship from B's point of view must imply that B has a duty to A.
An owner of land may hold four distinct entitlements: rights, privileges, powers, and immunities.